[LOG4J2-1990] ConcurrentModificationException logging a parameter of type Map

• Type: Bug
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.8.2
• Fix Version/s: 2.16.0
• Component/s: Core
• Flags: Important
• Assignee: Unassigned
• Reporter: Philippe Mouawad
• Created: 26/Jul/17 19:48
• Updated: 09/Feb/23 19:22

Description

Hello,
Working with current JMeter trunk and:

• attached test plan
• org.apache.jmeter.protocol.http.control.CacheManager level set to debug in log4j2.xml in bin folder

I get:

java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException
	at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_121]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.downloadPageResources(HTTPSamplerBase.java:1349) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.resultProcessing(HTTPSamplerBase.java:1657) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPAbstractImpl.resultProcessing(HTTPAbstractImpl.java:519) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:534) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1189) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1178) [ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:500) [ApacheJMeter_core.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:425) [ApacheJMeter_core.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:254) [ApacheJMeter_core.jar:3.3-SNAPSHOT.20170724]
	at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
Caused by: java.util.ConcurrentModificationException
	at org.apache.commons.collections.map.AbstractLinkedMap$LinkIterator.nextEntry(AbstractLinkedMap.java:560) ~[commons-collections-3.2.2.jar:3.2.2]
	at org.apache.commons.collections.map.AbstractLinkedMap$EntrySetIterator.next(AbstractLinkedMap.java:428) ~[commons-collections-3.2.2.jar:3.2.2]
	at org.apache.logging.log4j.message.ParameterFormatter.appendMap(ParameterFormatter.java:569) ~[log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.message.ParameterFormatter.appendPotentiallyRecursiveValue(ParameterFormatter.java:505) ~[log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.message.ParameterFormatter.recursiveDeepToString(ParameterFormatter.java:432) ~[log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.message.ParameterFormatter.formatMessage2(ParameterFormatter.java:189) ~[log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.message.ReusableParameterizedMessage.formatTo(ReusableParameterizedMessage.java:313) ~[log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.core.impl.MutableLogEvent.setMessage(MutableLogEvent.java:214) ~[log4j-core-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.core.impl.ReusableLogEventFactory.createEvent(ReusableLogEventFactory.java:81) ~[log4j-core-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:401) [log4j-core-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:63) [log4j-core-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:146) [log4j-core-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2091) [log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2005) [log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1876) [log4j-api-2.8.2.jar:2.8.2]
	at org.apache.logging.slf4j.Log4jLogger.debug(Log4jLogger.java:124) [log4j-slf4j-impl-2.8.2.jar:2.8.2]
	at org.apache.jmeter.protocol.http.control.CacheManager.getEntry(CacheManager.java:501) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.control.CacheManager.inCache(CacheManager.java:431) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:443) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase$ASyncSample.call(HTTPSamplerBase.java:2031) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase$ASyncSample.call(HTTPSamplerBase.java:1) ~[ApacheJMeter_http.jar:3.3-SNAPSHOT.20170724]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_121]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_121]
	at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_121]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[?:1.8.0_121]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[?:1.8.0_121]
	... 1 more