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https://issues.apache.org/jira/browse/SLING-7300?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16287539#comment-16287539
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Ivo Leitão commented on SLING-7300:
-----------------------------------
I've added the new thread dumps (new1..3.tdump) with the stacktrace in my last
comment
> CPU spike in i18n job
> ---------------------
>
> Key: SLING-7300
> URL: https://issues.apache.org/jira/browse/SLING-7300
> Project: Sling
> Issue Type: Bug
> Components: i18n, Karaf
> Affects Versions: i18n 2.5.10
> Environment: Linux, jdk1.8 latest version, Karaf 4.1.3
> Reporter: Ivo Leitão
> Priority: Critical
> Attachments: 1.tdump, 2.tdump, 3.tdump, cpuspike.png, new1.tdump,
> new2.tdump, new3.tdump
>
>
> Hi,
> I'm experiencing severe CPU spikes caused by the reload job in the i18n
> bundle. I've uploaded 3 threadumps which I analysed in http://fastthread.io.
> The analysis identified a cpu spike in the method scheduleReloadBundles of
> the class
> https://github.com/apache/sling-org-apache-sling-i18n/blob/master/src/main/java/org/apache/sling/i18n/impl/JcrResourceBundleProvider.java.
> This does not happen every time only on some situations. I've experienced
> this problem at least on the previous i18n bundle versions. Since there was
> changes on the mentioned class I've updated it hopping to get rid of this
> problem. Unfortunately I'm experiencing it again :-(
> Thread dump bellow:
> sling-default-1-JcrResourceBundleProvider: reload all resource bundles -
> priority:5 - threadId:0x00007f2ec851e800 - nativeId:0x1f72 - state:RUNNABLE
> stackTrace:
> java.lang.Thread.State: RUNNABLE
> at
> java.lang.ThreadLocal$ThreadLocalMap.getEntryAfterMiss(ThreadLocal.java:444)
> at java.lang.ThreadLocal$ThreadLocalMap.getEntry(ThreadLocal.java:419)
> at java.lang.ThreadLocal$ThreadLocalMap.access$000(ThreadLocal.java:298)
> at java.lang.ThreadLocal.get(ThreadLocal.java:163)
> at
> org.apache.logging.log4j.core.layout.StringBuilderEncoder.getByteBuffer(StringBuilderEncoder.java:115)
> at
> org.apache.logging.log4j.core.layout.StringBuilderEncoder.encode(StringBuilderEncoder.java:54)
> at
> org.apache.logging.log4j.core.layout.StringBuilderEncoder.encode(StringBuilderEncoder.java:32)
> at
> org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:219)
> at
> org.apache.logging.log4j.core.layout.PatternLayout.encode(PatternLayout.java:57)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:177)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:170)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:161)
> at
> org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender.append(RollingRandomAccessFileAppender.java:218)
> at
> org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:448)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:433)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:417)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:403)
> at
> org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:63)
> at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:146)
> at
> org.ops4j.pax.logging.log4j2.internal.PaxLoggerImpl.doLog0(PaxLoggerImpl.java:151)
> at
> org.ops4j.pax.logging.log4j2.internal.PaxLoggerImpl.doLog(PaxLoggerImpl.java:144)
> at
> org.ops4j.pax.logging.log4j2.internal.PaxLoggerImpl.inform(PaxLoggerImpl.java:176)
> at
> org.ops4j.pax.logging.internal.TrackingLogger.inform(TrackingLogger.java:86)
> at org.ops4j.pax.logging.slf4j.Slf4jLogger.info(Slf4jLogger.java:476)
> at
> org.apache.sling.i18n.impl.JcrResourceBundleProvider$1.run(JcrResourceBundleProvider.java:319)
> at
> org.apache.sling.commons.scheduler.impl.QuartzJobExecutor.execute(QuartzJobExecutor.java:347)
> at org.quartz.core.JobRunShell.run(JobRunShell.java:202)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748)
> Locked ownable synchronizers:
> - <0x00000000e6d47830> (a java.util.concurrent.ThreadPoolExecutor$Worker)
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