Remko Popma created LOG4J2-311:
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Summary: FastFileAppender and FastRollingFileAppender not
thread-safe
Key: LOG4J2-311
URL: https://issues.apache.org/jira/browse/LOG4J2-311
Project: Log4j 2
Issue Type: Bug
Components: Appenders, Core
Affects Versions: 2.0-beta8
Reporter: Remko Popma
Fix For: 2.0-beta9
FastFileManager#flush method needs to be synchronized.
I'm seeing the exception below. This can only happen if two threads modify the
ByteBuffer simultaneously.
{code}
2013-07-17 19:00:26,658 ERROR An exception occurred processing Appender
LatencyFile java.nio.BufferOverflowException
at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:183)
at
org.apache.logging.log4j.core.appender.FastFileManager.write(FastFileManager.java:96)
at
org.apache.logging.log4j.core.appender.OutputStreamManager.write(OutputStreamManager.java:129)
at
org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:115)
at
org.apache.logging.log4j.core.appender.FastFileAppender.append(FastFileAppender.java:87)
at
org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:102)
at
org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:426)
at
org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:407)
at
org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:368)
at org.apache.logging.log4j.core.Logger.log(Logger.java:110)
at
org.apache.logging.log4j.spi.AbstractLogger.info(AbstractLogger.java:1011)
at ...
{code}
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