| ReportEngine SystemCacheManager Blocked Lock Chains [message #1213473] |
Wed, 27 November 2013 03:51  |
Eclipse User |
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Hi Jason,
We are using Birt Run Time 4.2.1, and use Report Engine API to render documents - html/pdf and CSV.
On Production sometimes, the report engine stops responding, and a look at thread dump reveals that thread "Processor23" is stuck in removeCaches, and then all other threads get stuck because this method is perhaps synchronized.
It's not clear when exactly this happens, but situation is not recoverable from here. We need to restart the tomcat instance. Every request to Birt engine gets locked out, and the initial offending thread does not come out (it's native blocked, and does not look locked on any application lock)
Is this a bug in Report Engine caching, or some configuration issue. There is ample disk space, and after restart server runs quite ok.
Couldnt find anything related on forum or googling.
Thanks very much for your time.
THREAD DUMP (snippet)
"http-8000-Processor23" id=44 idx=0xf0 tid=769 prio=5 alive, native_blocked, daemon
at org/eclipse/birt/core/archive/cache/SystemCacheManager.removeCaches(SystemCacheManager.java:68)
at org/eclipse/birt/core/archive/cache/FileCacheManager.clear(FileCacheManager.java:138)
^-- Holding lock: org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220[thin lock]
^-- Holding lock: org/eclipse/birt/core/archive/cache/FileCacheManager@0x238918cc8[biased lock]
at org/eclipse/birt/core/archive/compound/v3/Ext2FileSystem.close(Ext2FileSystem.java:214)
^-- Holding lock: org/eclipse/birt/core/archive/compound/v3/Ext2FileSystem@0x238918c10[biased lock]
at org/eclipse/birt/core/archive/compound/ArchiveFileV3.close(ArchiveFileV3.java:69)
^-- Holding lock: org/eclipse/birt/core/archive/compound/ArchiveFileV3@0x238918b70[biased lock]
at org/eclipse/birt/core/archive/compound/ArchiveFile.close(ArchiveFile.java:225)
at org/eclipse/birt/core/archive/compound/ArchiveWriter.finish(ArchiveWriter.java:127)
at org/eclipse/birt/report/engine/api/impl/ReportDocumentWriter.close(ReportDocumentWriter.java:145)
at org/eclipse/birt/report/engine/api/impl/RunTask.closeReportDocument(RunTask.java:187)
at org/eclipse/birt/report/engine/api/impl/RunTask.doRun(RunTask.java:310)
at org/eclipse/birt/report/engine/api/impl/RunTask.run(RunTask.java:86)
Blocked lock chains
===================
Chain 2:
"http-8000-Processor2" id=23 idx=0x9c tid=748 waiting for org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220 held by:
"http-8000-Processor23" id=44 idx=0xf0 tid=769 in chain 1
Chain 3:
"http-8000-Processor3" id=24 idx=0xa0 tid=749 waiting for org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220 held by:
"http-8000-Processor23" id=44 idx=0xf0 tid=769 in chain 1
Chain 4:
"http-8000-Processor4" id=25 idx=0xa4 tid=750 waiting for org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220 held by:
"http-8000-Processor23" id=44 idx=0xf0 tid=769 in chain 1
Chain 5:
"http-8000-Processor5" id=26 idx=0xa8 tid=751 waiting for org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220 held by:
"http-8000-Processor23" id=44 idx=0xf0 tid=769 in chain 1
Chain 6:
"http-8000-Processor6" id=27 idx=0xac tid=752 waiting for org/eclipse/birt/core/archive/cache/SystemCacheManager@0x11cbdd220 held by:
"http-8000-Processor23" id=44 idx=0xf0 tid=769 in chain 1
Regards
Sachet
[Updated on: Wed, 27 November 2013 05:49] by Moderator |
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