[
http://jira.qos.ch/browse/LBCLASSIC-289?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Ceki Gulcu resolved LBCLASSIC-289.
----------------------------------
Fix Version/s: 0.9.30
Resolution: Fixed
Fixed in [1] . LogbackMDCAdapter now synchronizes over its thread local map.
This prevents ConcurrentModificationException from occurring while a child
thread copies the map from the parent. There should be very little contention
due to the synchronization because unrelated threads use different maps and
parent/child threads will use different maps after the first write operation
performed by the child thread.
[1] http://github.com/ceki/logback/commit/7a2e02bca24
> ConcurrentModificationException when using MDC
> ----------------------------------------------
>
> Key: LBCLASSIC-289
> URL: http://jira.qos.ch/browse/LBCLASSIC-289
> Project: logback-classic
> Issue Type: Bug
> Components: appender
> Affects Versions: 0.9.29
> Environment: Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-383,
> mixed mode)
> Darwin aden 11.1.0 Darwin Kernel Version 11.1.0: Tue Jul 26 16:07:11 PDT
> 2011; root:xnu-1699.22.81~1/RELEASE_X86_64 x86_64
> Reporter: Josh Oddman
> Assignee: Ceki Gulcu
> Fix For: 0.9.30
>
>
> In some rare cases in multithreaded environment MDC.put throws
> ConcurrentModificationException.
> java.util.ConcurrentModificationException: null
> at java.util.HashMap$HashIterator.nextEntry(HashMap.java:793)
> ~[na:1.6.0_26]
> at java.util.HashMap$EntryIterator.next(HashMap.java:834)
> ~[na:1.6.0_26]
> at java.util.HashMap$EntryIterator.next(HashMap.java:832)
> ~[na:1.6.0_26]
> at java.util.HashMap.putAll(HashMap.java:523) ~[na:1.6.0_26]
> at
> ch.qos.logback.classic.util.LogbackMDCAdapter.duplicateAndInsertNewMap(LogbackMDCAdapter.java:69)
>
> ~[logback-classic-0.9.29.jar:na]
> at
> ch.qos.logback.classic.util.LogbackMDCAdapter.put(LogbackMDCAdapter.java:95)
> ~[logback-classic-0.9.29.jar:na]
> at org.slf4j.MDC.put(MDC.java:112) ~[slf4j-api-1.6.1.jar:1.6.1]
--
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators:
http://jira.qos.ch/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira
_______________________________________________
logback-dev mailing list
[email protected]
http://qos.ch/mailman/listinfo/logback-dev
