The diagnosis earlier in this thread is correct, and this is indeed a Docker\-image fix \(the XWiki/XJetty counterpart was already done in XWIKI\-21708, 16.4.0\).
The {{No space left on device}} message is misleading: the embedded Solr suggester \({{LookupFactory}}\) \- and various other libraries \- write temporary files directly to {{java.io.tmpdir}}, which is not configurable at the Solr level. In a container that default location can be small or {{tmpfs}}\-backed, so it fills up even when the mapped {{/usr/local/xwiki/data}} volume has plenty of free space. That matches the SOLR\-10937 pattern.
Fix made in the image: \* {{tomcat/setenv.sh}} now sets {{\-Djava.io.tmpdir=/usr/local/xwiki/data/tmp}}, i.e. on the mapped permanent volume, which always has real disk space. It stays overridable through the {{JAVA\_OPTS}} environment variable. \* Because that directory lives on the persistent volume and nothing in the container reaps temporary files \(there is no OS tmp\-reaper, and the volume survives restarts\), {{xwiki/docker\-entrypoint.sh}} now empties it on every container start, before Tomcat launches. This keeps it from growing without bound and mirrors what XWiki's own Environment does for its {{xwiki\-temp}} directory.
Workaround on the current image until a new one is published \- create the directory once and set the JVM temp dir via JAVA\_OPTS, e.g. in docker\-compose: {code} environment: \- JAVA\_OPTS JAVA_OPTS=\-Djava.io.tmpdir=/usr/local/xwiki/data/tmp \-Xmx1024m {code} \(create {{/usr/local/xwiki/data/tmp}} on the volume first, since the JVM won't create it\). Could you confirm this resolves the crashes on your side?
Vincent Massol on 18/Jul/26 12:48
Correction after building and running the fix on 18.5.0 \+ PostgreSQL 18:
Setting {{java.io.tmpdir}} through {{JAVA\_OPTS}} \(as I described in my previous comment\) does NOT work. Tomcat's {{catalina.sh}} appends {{\-Djava.io.tmpdir=$CATALINA\_TMPDIR}} _after_ JAVA\_OPTS, so with the JVM's "last \-D wins" rule the default {{/usr/local/tomcat/temp}} still won \- I confirmed the temp files kept landing there. Please disregard the {{JAVA\_OPTS=\-Djava.io.tmpdir=...}} workaround from my earlier comment.
The correct fix, now implemented and verified, is to set {{CATALINA\_TMPDIR}} in {{tomcat/setenv.sh}} \(catalina.sh only defaults it when empty, so it wins\), plus the empty\-on\-start cleanup in {{xwiki/docker\-entrypoint.sh}}. Verified on the running container: \* JVM command line shows a single {{\-Djava.io.tmpdir=/usr/local/xwiki/data/tmp}} \(confirmed in Tomcat's own VersionLoggerListener log\). \* Temporary files \(JODConverter, etc.\) now land in {{/usr/local/xwiki/data/tmp}} on the mapped volume, no longer in {{/usr/local/tomcat/temp}}. \* The directory is emptied on every container start \(planted a marker file, restarted, it was gone\). \* XWiki boots normally \(HTTP 200\), no {{FileSystemException}} / "No space left on device".
Corrected workaround for the current image until a new one is published \- set {{CATALINA\_TMPDIR}} \(not java.io.tmpdir via JAVA\_OPTS\) and pre\-create the directory on the volume, e.g. in docker\-compose: {code} environment: \- CATALINA\_TMPDIR CATALINA_TMPDIR=/usr/local/xwiki/data/tmp {code} \(create {{/usr/local/xwiki/data/tmp}} on the volume first, since the JVM won't create it\). Could you confirm this resolves the crashes on your side?
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