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: Logback dev list
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]
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