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XWiki Platform / cid:jira-generated-image-avatar-3ac17d88-f103-4ad8-9991-6c6cd498a2e5 XWIKI-25004 Open

Warning about "Failed to parse date" using a modern format on XWiki 17.10.13

 
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Issue created

 
cid:jira-generated-image-avatar-27cd4a8f-2141-4ccd-aa2b-b4148bce66ee Ilie Andriuta created this issue on 16/Sep/26 15:05
 
Summary: Warning about "Failed to parse date" using a modern format on XWiki 17.10.13
Issue Type: cid:jira-generated-image-avatar-3ac17d88-f103-4ad8-9991-6c6cd498a2e5 Bug
Affects Versions: 17.10.13
Assignee: Unassigned
Components: Old Core
Created: 16/Sep/26 15:05
Environment: Windows 11 Pro, Edge 153, using an instance of XWiki 17.10.13 , Jetty/HSQL standalone distribution, Java 25 and Java 21
Priority: cid:jira-generated-image-static-minor-22c6756b-ec26-41c9-a1ed-462f6f3b423d Minor
Reporter: Ilie Andriuta
Description:

Steps to reproduce

  1. Start a Jetty/HSQL demo instance (I've tested with the Standard Flavor Pre-installed)
  2. Observe the XWiki logs

Expected results

No (other) warnings are displayed.

Actual results

The following warnings are displayed in XWiki console:

2026-09-16 15:24:46,635 [task-manager-consumer] WARN  ateXarObjectPropertySerializer - Failed to parse date [Tue Jun 13 14:29:31 CEST 2017] using format [yyyy-MM-dd HH:mm:ss.S]. Trying again with format [EEE MMM d HH:mm:ss z yyyy].
2026-09-16 15:24:46,667 [task-manager-consumer] WARN  ateXarObjectPropertySerializer - Failed to parse date [Tue Jun 13 14:29:31 CEST 2017] using format [yyyy-MM-dd HH:mm:ss.S]. Trying again with format [EEE MMM d HH:mm:ss z yyyy].
2026-09-16 15:24:46,681 [task-manager-consumer] WARN  ateXarObjectPropertySerializer - Failed to parse date [Tue Jun 13 14:29:31 CEST 2017] using format [yyyy-MM-dd HH:mm:ss.S]. Trying again with format [EEE MMM d HH:mm:ss z yyyy].

The warnings were reproduced also when importing a XAR, but it seems it doesn't reproduce consistently more than when just starting the XWiki instance.

Also, it seems the warning couldn't be reproduced on XWiki 17.10.12 or 18.4.5 (tried multiple instance start-ups), but again, I couldn't find a consistent way to reproduce them.

 
 

1 update

 
cid:jira-generated-image-avatar-27cd4a8f-2141-4ccd-aa2b-b4148bce66ee Changes by Ilie Andriuta on 16/Sep/26 15:09
 
Attachment: Full_XWiki_17_10_13_Jetty_Start_Up_logs.txt
 
 

1 comment

 
cid:jira-generated-image-avatar-27cd4a8f-2141-4ccd-aa2b-b4148bce66ee Ilie Andriuta on 16/Sep/26 15:07
 

The issue was also reproduced by Andreea Tarata and is reported as Minor because after asking an internal AI, it stated that it's not impactful for users.