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https://issues.apache.org/jira/browse/LOG4J2-3549?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17564627#comment-17564627
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Ralph Goers commented on LOG4J2-3549:
-------------------------------------
You have provided no evidence of a deadlock. First, to show a deadlock you must
provide stack traces from at least 2 threads showing the deadlock. You have
only provided one thread. Furthermore, the stack trace for the thread you
provided shows it is runnable so it is not blocked.
Please provide proper documentation of a deadlock or this will be closed.
> The printed thread deadlock
> ---------------------------
>
> Key: LOG4J2-3549
> URL: https://issues.apache.org/jira/browse/LOG4J2-3549
> Project: Log4j 2
> Issue Type: Bug
> Components: Log4j 1.2 bridge
> Affects Versions: 2.17.2
> Reporter: yimiluo
> Priority: Minor
> Attachments: image-2022-07-08-20-20-11-818.png
>
>
> When we were printing the log, the printed thread was deadlocked, causing the
> service to go down. The following is the exception information:
> !image-2022-07-08-20-20-11-818.png|width=895,height=537!
> {code:java}
> [arthas@1]$ thread -b
> "http-nio-8080-exec-5" Id=97 RUNNABLE (in native)
> at [email protected]/java.io.FileOutputStream.writeBytes(Native Method)
> at
> [email protected]/java.io.FileOutputStream.write(FileOutputStream.java:354)
> at
> [email protected]/java.io.BufferedOutputStream.write(BufferedOutputStream.java:123)
> - locked java.io.BufferedOutputStream@ea9396a
> at [email protected]/java.io.PrintStream.write(PrintStream.java:559)
> - locked java.io.PrintStream@3ff1e46c
> at
> org.apache.logging.log4j.core.util.CloseShieldOutputStream.write(CloseShieldOutputStream.java:53)
> at
> org.apache.logging.log4j.core.appender.OutputStreamManager.writeToDestination(OutputStreamManager.java:250)
> at
> org.apache.logging.log4j.core.appender.OutputStreamManager.flushBuffer(OutputStreamManager.java:283)
> - locked
> org.apache.logging.log4j.core.appender.OutputStreamManager@7ba4158c <---- but
> blocks 236 other threads!
> at
> org.apache.logging.log4j.core.appender.OutputStreamManager.flush(OutputStreamManager.java:294)
> - locked
> org.apache.logging.log4j.core.appender.OutputStreamManager@7ba4158c <---- but
> blocks 236 other threads!
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:199)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:190)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:181)
> at
> org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:161)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:134)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:125)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:89)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:542)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:500)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:483)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:417)
> at
> org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:82)
> at org.apache.logging.log4j.core.Logger.log(Logger.java:161)
> at
> org.apache.logging.log4j.spi.AbstractLogger.tryLogMessage(AbstractLogger.java:2205)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageTrackRecursion(AbstractLogger.java:2159)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2142)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:2028)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1891)
> at org.apache.logging.slf4j.Log4jLogger.info(Log4jLogger.java:194) {code}
>
> I don't know what the solution is now. I would be very grateful if you could
> reply.
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