xwiki-devs October 2017

xwiki-devs@xwiki.org

15 participants
26 discussions

[xwiki-devs] [VOTE] Use discourse for the "dev" mailing list

by Guillaume Delhumeau

Hi devs, I think we are now satisfied with our experimentation with the "users" mailing list on discourse. I propose you to move the "dev" ML too. My main point is that it allows advanced formatting (which is good when you have complex proposals), meanwhile the formatting is lost with our archiving tool like markmail (it's plain text). Here is my +1. Thanks, -- Guillaume Delhumeau (guillaume.delhumeau(a)xwiki.com) Research & Development Engineer at XWiki SAS Committer on the XWiki.org project

5 years, 1 month

[xwiki-devs] [proposal] Process to handle Pull Requests

by Ludovic Dubost

Hi devs, I don't think there is currently a process that is in place to handle pull requests and I have the feeling that the way there are handled today is a bit random. There are usually comments sent out on each pull request but sometimes it seems that some pull requests are going in sleep mode and it's not clear who is in charge. I would like to suggest that a process is put in place where it's clear who is responsible for a pull request and a status is given to the contributors that propose that pull request. Something like: Assigned developer: XXXX Status: New -> new pull request, not yet assigned Assigned -> assigned to a developer, he is in charge of reviewing the pull request and ask for modifications or accept it. The developer can auto assign it to himself. If nobody does, we need to decide how they will be taken into account. ModificationsRequired -> for now rejected with comments. Contributor needs to apply comments and then change back to Assigned for further evaluation VoteRequired -> there are no more comments, but a vote is required as the changes to XWiki core are important WaitingFinalAuthorization -> optional step for complex patches where a additional authorization would be required (need to define who would be the persons that give the authorization) WaitingApplication -> there are no more comments and no changes or vote required. The pull request can be applied and is waiting for a developer to apply it Abandoned -> contributors is abandoning the pull request (cannot do the changes, no more time, etc..) Rejected -> pull request is rejected (quality not enough, etc..) Applied -> pull request is applied What do you think ? Ludovic -- Ludovic Dubost Founder and CEO Blog: http://blog.ludovic.org/ XWiki: http://www.xwiki.com Skype: ldubost GTalk: ldubost

5 years, 6 months

[xwiki-devs] Velocity 2.0 and DeprecatedCheckUberspector

by Claude Brisson

Hi. I'm currently working on Velocity 2.0 packaging. If that's OK with you, I would like to incorporate DeprecatedCheckUberspector.java into Velocity, but I need a statement from your part to be able to change its licence to Apache 2.0 (LGPL and Apache 2.0 licences aren't compatible). By the way, I take this opportunity to tell you that if there is another specific part of xwiki-commons-velocity that you think should be integrated on our side, or an important missing feature you'd like to insist on, don't hesitate. I already integrated VELOCITY-825, for instance, so String->Enum constant conversions are now handled by Velocity. There may be other important conversion cases you'd like to see handled. Regards, Claude

6 years, 4 months

[xwiki-devs] [Vote] Assignee for PR: Contributor or Committer?

by Ecaterina Moraru (Valica)

Hi, We have discussed this subject multiple times, but we don't have an official vote and conclusion on the topic. Problem: In JIRA who is the Assignee of an issue fixed by a Pull Request? 1: Contributor - he provided the solution - giving the attributions, the contributor might feel encouraged to contribute more - we could do some JIRA statistics on external contributions, but this use case can be covered by GitHub statistics 2: Committer - he does the merging on his account and he becomes responsible for the committed code. - in case there are problems, the committer needs to find solution, since we can't rely on contributors availability - in doing the PR review, the committer spends a lot of time analyzing and testing the provided solution We are talking here about complete solutions provided by the PR, since in case of partial solutions, the committer can assign himself on the issue (depends on the quantity of modification he does). Let me know what you think, Caty

6 years, 6 months

[xwiki-devs] [Proposal][UX] Notifications Improvements 9.8+

by Ecaterina Moraru (Valica)

Hi, I've created some improvements suggestions for our Notifications UI, see http://design.xwiki.org/xwiki/bin/view/Proposal/NotificationsImprovements9x Let me know what you think. Thanks, Caty

7 years

[xwiki-devs] Some problem while writing tests.

by Sarthak Gupta

Hello, I have a component implementation GlossaryTransformation.java <https://github.com/xwiki-contrib/application-glossary/blob/master/applicati…>. So it has two methods List<String> getGlossaryEntries() and transform(Block block, TransformationContext context) in it. So, I have a test file https://pastebin.com/NixuBMjD for this component. Here I am trying to mock the behavior of getGlossaryEntries method by putting strings ("glossaryEntry1" and "glossaryEntry2"). And then implementing "when(this.glossaryTransformation.getGlossaryEntries()).thenReturn(mockArrayList);" but this line somehow shows NullPointerException. On searching on StackOverflow, I found that this is happening because the object of "glossaryTransfromation" is not created, but only a reference is created. So, I tried to put glosaaryTransformation = "mock(GlossaryTransformation.class)" in the code. Yes, the above error was resolved, but the line "Parser parser = this.mocker.getInstance(Parser.class, "xwiki/2.1");" gave an error " ComponentLookupException: Can't find descriptor for the component [role = [interface org.xwiki.rendering.parser.Parser] hint = [xwiki/2.1]]" . Is there a better way to achieve this? Or I think a better approach can be to put the Query method (getGlossaryEntries) of GlossarryTranformation.java in a separate class and then create a mock object for that class and then run the test? Thanks -Sarthak Gupta

7 years

[xwiki-devs] [Proposal] Replace OpenJS Keyboard JS with Keypress JS for handling keyboard shoirtcuts

by Vincent Massol

Hi devs, We’re currently using http://www.openjs.com/scripts/events/keyboard_shortcuts/ but it has some limitations. Clement and I tried to find some unused combinations of keys that works on Mac and Unix and we couldn’t find any that worked with it. It also doesn’t support having combinations with several letters for example. For example we could imagine having H+H+H for turning on/off hidden documents (as a developer key sequence since it’s not a user use case). I’d like to propose using https://dmauro.github.io/Keypress/ which is under the Apache 2 license and that seems to work well on Mac and Unix and it’s very powerful. See sequence combos for example. The API look simple and nice and I don’t think it would be hard to continue support our data structure inside the “shortcuts” variable to make it work with it. WDYT? Thanks -Vincent

7 years

[xwiki-devs] XWiki has been selected as a Google Code-in 2017 mentoring organization

by Thomas Mortagne

Hi everyone, We just received a mail from Google confirming us that we have been selected ! So we now (actually as soon as the website will be in sync with the mails :)) have 1 month to create tons of tasks for the students. And if you did not added yourself to http://dev.xwiki.org/xwiki/bin/view/GoogleCodeIn/#HMentors it's not tool later and we would be happy to welcome more mentors :) Have fun ! -- Thomas Mortagne

7 years

Re: [xwiki-devs] Creation of transformation

by Vincent Massol

Hi Sarthak, > On 15 Oct 2017, at 21:43, Sarthak Gupta <sarthakgupta072(a)gmail.com> wrote: > > > > On Sun, Oct 15, 2017 at 7:53 PM, Vincent Massol <vincent(a)xwiki.com> wrote: > Hi Sarthak, > > > On 14 Oct 2017, at 09:52, Sarthak Gupta <sarthakgupta072(a)gmail.com> wrote: > > > > Hello, > > As the tests of my project application-glossary > > <https://github.com/xwiki-contrib/application-glossary> are not working > > I’ll try to have a look when I’m back from GSOC summit. > > > , in > > spite of my attempts(I will handle then later), I am moving on to > > implementing the next feature of the application i.e creating > > transformation. > > As far as I understand, the transformation requires a cache component from > > which entries shall be taken for rendering purpose. This cache should get > > updated when a glossary xobject is added, deleted or modified. For this > > functionality to take place, it should make use of an Event Listener. > > > > Hope I am right till now? > > Yes that’s exactly it! > > > Hello Vincent, > > What I would suggest is that you implement the Transformation without cache for the first version, you make the app work fully end to end, you release a 1.0 version that the community can try out, and then you start working on version 1.1 which adds the cache to improve performance. > > WDYT? > > I think for implementing the transformations, some source will be required from which the entries already present in the Glossary space will be taken. Here it is the cache object. So, an alternative here can be to use the "query module" everytime for knowing which entries are present in the Glossary Space. And that would slow down the Xwiki to a large extent I guess because for each word a query will be executed. Would using the "Query" be fine or there can be any other better approach? Some ideas: Version 1.0: * When the transformation executes (i.e. when a page is rendered), you do a query to get the glossary entries. Version 1.1: * You make your transformation implement Initializable and in initialize() you go a query to get all existing Glossary entries that you save in a cache component that you write * The cache component internally uses a Cache<> object for storing the Glossary entries * You also implement a component implementing EventListener that gets the cache component injected so that you can update the cache when glossary xobjects are created/modified/deleted. If you feel comfortable you can implement directly version 1.1 but my recommendation would be get a working v1.0 version ASAP and then iterate to improve it. Hope it helps, Thanks -Vincent PS: Please keep the discussion on the list so that anyone can help you and see the answers and chime in or just learn from it! :) > Thanks > > Sarthak Gupta > > > > > > I have a question in my mind. > > > > The "cache" and the "event Listener" are to be implemented as two separate > > components. right? > > Correct. > > > What I think is, that the EventListener component should be filled with > > appropriate methods just like this > > <https://github.com/xwiki/xwiki-platform/blob/master/xwiki-platform-core/xwi…> > > and > > then in these methods, the cache should be updated. > > > > Is this implementation right? > > Correct. > > > And after this, the rendering part will come…. > > Awesome. > > Thanks. Let me know if you need more of my/our help. > -Vincent > > > > > Thanks > > > > Sarthak Gupta

7 years

[xwiki-devs] XWiki Security Cache global read/write lock scalability

by ktc

We ran into an issue recently where users were not able to access the Wiki due to the XWiki security cache holding up access to read requests as we were experiencing heap exhaustion. A thread dump of a host showed that there were 211 security cache read locks and 2 security cache write locks during the event. Read locks are supposedly parallelizable, so we suspect that it was the write locks that blocked the read requests. Looking into the write locks, we found *DefaultSecurityCacheRulesInvalidatorListener* shares a read-write lock (*SecurityCacheRulesInvalidator*) with the security cache loader (*DefaultSecurityCacheLoader*). It appears that these write requests to the security cache were potentially creating a deadlock, blocking any further read requests. Our investigation of this event resulted in the following questions that we are hoping to get answered by reaching out here: 1. What exactly happens in the event of a write failure to the Security Cache? Are we correct in understanding that the write request will continue to hold a lock on the cache, preventing all read requests from proceeding? 2. If so, are there any mitigations around the global read-write lock on the security cache? Or, perhaps, is the best action is to simply move toward a more scalable caching mechanism (i.e. a centralized cache such as Elastic Cache)? 3. It looks as if all threads doing a read/write request to the SecurityCache were all parked waiting for the same thread (3081f946); however, the thread is not showing up in the thread dump so we are not sure what it is stuck on. Does the XWiki team have any suspicions as to what could be hold up the requests to the SecurityCache? Thank you! --- For more information on the event: >From our investigation, we concluded that the outage happened because: 1. Remote events triggered a security cache update and requested a couple of write locks 2. The writes could not execute (perhaps due to the heap exhaustion, although root cause of write failure is unknown) 3. ReentrantReadWriteLock lock followed a fair policy, which releases locks in time order, so read requests were forced to wait for any previous write requests to finish. Because the write requests couldn't finish, the remaining 211 threads were blocked. * Possible remote events that trigger security cache update: changes to an XWiki group such as leaving the admin group, user first time visiting XWiki, etc.. ---- *LDAP Connection Lock example:* Thread t@225108 java.lang.Thread.State: TIMED_WAITING at java.lang.Object.wait(Native Method) - waiting on <7249fc39> (a com.novell.ldap.Connection) at com.novell.ldap.Connection.waitForReader(Unknown Source) at com.novell.ldap.Connection.startReader(Unknown Source) at com.novell.ldap.Connection.connect(Unknown Source) at com.novell.ldap.Connection.connect(Unknown Source) at com.novell.ldap.LDAPConnection.connect(Unknown Source) at com.ownership.groups.ldap.DefaultLdapConnection.connect(DefaultLdapConnection.java:25) at com.ownership.groups.ldap.LdapClient.queryGroups(LdapClient.java:99) at com.ownership.groups.ldap.LdapClient.getGroupsForUser(LdapClient.java:64) at com.ownership.groups.ldap.LdapClient.getGroupsForUser(LdapClient.java:59) at com.ownership.groups.GroupService.getAllGroupsReferencesForMember(GroupService.java:113) - locked <7cc1cfca> (a java.lang.String) at com.ownership.groups.GroupService.getAllGroupsReferencesForMember(GroupService.java:75) at org.xwiki.security.internal.DefaultUserBridge.getGroupsReferencesFor(DefaultUserBridge.java:122) at org.xwiki.security.internal.DefaultUserBridge.getAllGroupsFor(DefaultUserBridge.java:78) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.loadUserGroups(DefaultSecurityCacheLoader.java:350) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.loadUserGroups(DefaultSecurityCacheLoader.java:342) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.loadUserEntry(DefaultSecurityCacheLoader.java:318) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.loadAccessEntries(DefaultSecurityCacheLoader.java:221) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.loadRequiredEntries(DefaultSecurityCacheLoader.java:193) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.load(DefaultSecurityCacheLoader.java:148) at org.xwiki.security.authorization.DefaultAuthorizationManager.getAccess(DefaultAuthorizationManager.java:218) at org.xwiki.security.authorization.DefaultAuthorizationManager.evaluateSecurityAccess(DefaultAuthorizationManager.java:159) at org.xwiki.security.authorization.DefaultAuthorizationManager.hasSecurityAccess(DefaultAuthorizationManager.java:152) at org.xwiki.security.authorization.DefaultAuthorizationManager.hasAccess(DefaultAuthorizationManager.java:109) at org.xwiki.display.internal.AbstractDocumentTitleDisplayer.displayTitle(AbstractDocumentTitleDisplayer.java:163) at org.xwiki.display.internal.AbstractDocumentTitleDisplayer.display(AbstractDocumentTitleDisplayer.java:149) at org.xwiki.display.internal.AbstractDocumentTitleDisplayer.display(AbstractDocumentTitleDisplayer.java:58) at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:96) at org.xwiki.display.internal.DefaultDocumentDisplayer.display(DefaultDocumentDisplayer.java:39) at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:123) at org.xwiki.sheet.internal.SheetDocumentDisplayer.display(SheetDocumentDisplayer.java:52) at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:68) at org.xwiki.display.internal.ConfiguredDocumentDisplayer.display(ConfiguredDocumentDisplayer.java:42) at com.xpn.xwiki.doc.XWikiDocument.getRenderedTitle(XWikiDocument.java:1538) at com.xpn.xwiki.doc.XWikiDocument.getRenderedTitle(XWikiDocument.java:1558) at com.xpn.xwiki.api.Document.getDisplayTitle(Document.java:345) at sun.reflect.GeneratedMethodAccessor289.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.runtime.parser.node.PropertyExecutor.execute(PropertyExecutor.java:142) at org.apache.velocity.util.introspection.UberspectImpl$VelGetterImpl.invoke(UberspectImpl.java:539) at org.apache.velocity.runtime.parser.node.ASTIdentifier.execute(ASTIdentifier.java:198) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:151) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.apache.velocity.runtime.parser.node.ASTStringLiteral.value(ASTStringLiteral.java:330) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886) at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886) at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:463) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:210) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at actiontrace.generation.servlet.StorageBindingFilter.doFilter(StorageBindingFilter.java:40) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.spnego.http.InitiateAction.run(HttpAuthFilter.java:215) at com.spnego.http.HttpAuthFilter.executeFilterWithCreds(HttpAuthFilter.java:176) at com.spnego.http.HttpAuthFilter.doFilter(HttpAuthFilter.java:74) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.build.brazil.filters.FQDNFilter.doFilter(FQDNFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at com.tomcat.valves.QueryLogValve.invoke(QueryLogValve.java:157) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1126) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) - locked <1cc68e56> (a org.apache.tomcat.util.net.SocketWrapper) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - locked <79120011> (a java.util.concurrent.ThreadPoolExecutor$Worker) ---- *Security Cache Read Lock example:* Thread t@225106 java.lang.Thread.State: WAITING at sun.misc.Unsafe.park(Native Method) - parking to wait for <3081f946> (a java.util.concurrent.locks.ReentrantReadWriteLock$FairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836) at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireShared(AbstractQueuedSynchronizer.java:967) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireShared(AbstractQueuedSynchronizer.java:1283) at java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock.lock(ReentrantReadWriteLock.java:727) at org.xwiki.security.authorization.internal.DefaultSecurityCacheRulesInvalidator.suspend(DefaultSecurityCacheRulesInvalidator.java:56) at org.xwiki.security.authorization.cache.internal.DefaultSecurityCacheLoader.load(DefaultSecurityCacheLoader.java:144) at org.xwiki.security.authorization.DefaultAuthorizationManager.getAccess(DefaultAuthorizationManager.java:218) at org.xwiki.security.authorization.DefaultAuthorizationManager.evaluateSecurityAccess(DefaultAuthorizationManager.java:159) at org.xwiki.security.authorization.DefaultAuthorizationManager.hasSecurityAccess(DefaultAuthorizationManager.java:152) at org.xwiki.security.authorization.DefaultAuthorizationManager.hasAccess(DefaultAuthorizationManager.java:109) at org.xwiki.security.authorization.internal.XWikiCachingRightService.hasAccessLevel(XWikiCachingRightService.java:309) at com.xpn.xwiki.api.XWiki.getDocument(XWiki.java:270) at com.xpn.xwiki.api.XWiki.getDocument(XWiki.java:254) at sun.reflect.GeneratedMethodAccessor281.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:567) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886) at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:87) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886) at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.XWiki.parseTemplate(XWiki.java:2080) at com.xpn.xwiki.api.XWiki.parseTemplate(XWiki.java:886) at sun.reflect.GeneratedMethodAccessor279.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:395) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:384) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:173) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:280) at org.apache.velocity.runtime.parser.node.ASTReference.render(ASTReference.java:369) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.directive.VelocimacroProxy.render(VelocimacroProxy.java:216) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:311) at org.apache.velocity.runtime.directive.RuntimeMacro.render(RuntimeMacro.java:230) at org.apache.velocity.runtime.parser.node.ASTDirective.render(ASTDirective.java:207) at org.apache.velocity.runtime.parser.node.ASTBlock.render(ASTBlock.java:72) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.apache.velocity.runtime.parser.node.ASTIfStatement.render(ASTIfStatement.java:106) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:342) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluateInternal(DefaultVelocityEngine.java:259) at org.xwiki.velocity.internal.DefaultVelocityEngine.evaluate(DefaultVelocityEngine.java:222) at com.xpn.xwiki.render.DefaultVelocityManager.evaluate(DefaultVelocityManager.java:361) at com.xpn.xwiki.internal.template.InternalTemplateManager.evaluateContent(InternalTemplateManager.java:790) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:667) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:645) at com.xpn.xwiki.internal.template.InternalTemplateManager.renderFromSkin(InternalTemplateManager.java:616) at com.xpn.xwiki.internal.template.InternalTemplateManager.render(InternalTemplateManager.java:602) at com.xpn.xwiki.internal.template.DefaultTemplateManager.render(DefaultTemplateManager.java:77) at com.xpn.xwiki.XWiki.evaluateTemplate(XWiki.java:2102) at com.xpn.xwiki.web.Utils.parseTemplate(Utils.java:180) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:463) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:210) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913) at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449) at javax.servlet.http.HttpServlet.service(HttpServlet.java:624) at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.xpn.xwiki.web.ActionFilter.doFilter(ActionFilter.java:112) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.wysiwyg.server.filter.ConversionFilter.doFilter(ConversionFilter.java:127) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at actiontrace.generation.servlet.StorageBindingFilter.doFilter(StorageBindingFilter.java:40) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.spnego.http.InitiateAction.run(HttpAuthFilter.java:215) at com.spnego.http.HttpAuthFilter.executeFilterWithCreds(HttpAuthFilter.java:176) at com.spnego.http.HttpAuthFilter.doFilter(HttpAuthFilter.java:74) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at com.build.brazil.filters.FQDNFilter.doFilter(FQDNFilter.java:170) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SetHTTPHeaderFilter.doFilter(SetHTTPHeaderFilter.java:63) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SavedRequestRestorerFilter.doFilter(SavedRequestRestorerFilter.java:208) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.container.servlet.filters.internal.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:111) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.xwiki.resource.servlet.RoutingFilter.doFilter(RoutingFilter.java:136) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:615) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) at com.tomcat.valves.QueryLogValve.invoke(QueryLogValve.java:157) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962) at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1126) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) - locked <4da86584> (a org.apache.tomcat.util.net.SocketWrapper) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - locked <1479d987> (a java.util.concurrent.ThreadPoolExecutor$Worker) ---- *Security Cache Write Lock example:* Thread t@178 java.lang.Thread.State: WAITING at sun.misc.Unsafe.park(Native Method) - parking to wait for <3081f946> (a java.util.concurrent.locks.ReentrantReadWriteLock$FairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199) at java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock.lock(ReentrantReadWriteLock.java:943) at org.xwiki.security.authorization.internal.DefaultSecurityCacheRulesInvalidatorListener.onEvent(DefaultSecurityCacheRulesInvalidatorListener.java:186) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:304) at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:269) at org.xwiki.observation.remote.internal.DefaultRemoteObservationManager.notify(DefaultRemoteObservationManager.java:168) at com.wiki.observation.remote.jgroups.JGroupsReceiver.receive(JGroupsReceiver.java:87) at org.jgroups.JChannel.up(JChannel.java:768) at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:1034) at org.jgroups.protocols.FRAG2.up(FRAG2.java:182) at org.jgroups.protocols.FlowControl.up(FlowControl.java:438) at org.jgroups.stack.Protocol.up(Protocol.java:426) at org.jgroups.protocols.pbcast.STABLE.up(STABLE.java:294) at org.jgroups.protocols.UNICAST3.up(UNICAST3.java:487) at org.jgroups.protocols.pbcast.NAKACK2.deliverBatch(NAKACK2.java:989) at org.jgroups.protocols.pbcast.NAKACK2.removeAndPassUp(NAKACK2.java:919) at org.jgroups.protocols.pbcast.NAKACK2.handleMessage(NAKACK2.java:851) at org.jgroups.protocols.pbcast.NAKACK2.up(NAKACK2.java:611) at org.jgroups.protocols.VERIFY_SUSPECT.up(VERIFY_SUSPECT.java:155) at org.jgroups.protocols.FD.up(FD.java:260) at org.jgroups.protocols.MERGE3.up(MERGE3.java:292) at org.jgroups.protocols.Discovery.up(Discovery.java:296) at org.jgroups.protocols.TP.passMessageUp(TP.java:1657) at org.jgroups.protocols.TP$SingleMessageHandler.run(TP.java:1873) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) Locked ownable synchronizers: - locked <2ea19041> (a java.util.concurrent.ThreadPoolExecutor$Worker) -- Sent from: http://xwiki.475771.n2.nabble.com/XWiki-Dev-f475773.html

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xwiki-devs October 2017