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https://issues.apache.org/jira/browse/LOG4J2-295?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Remko Popma updated LOG4J2-295:
-------------------------------
Fix Version/s: 2.0-beta8
> BufferOverflowException in FastFileManager when logging huge messages
> ---------------------------------------------------------------------
>
> Key: LOG4J2-295
> URL: https://issues.apache.org/jira/browse/LOG4J2-295
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-beta7
> Reporter: Tom Wieczorek
> Assignee: Remko Popma
> Fix For: 2.0-beta8
>
>
> When logging messages larger than {{FastFileManager.DEFAULT_BUFFER_SIZE}}
> with appenders using {{FastFileManager}}, the logging fails internally with a
> {{BufferOverflowException}} and no log output is produced by these appenders.
> ----
> *Test case*
> {noformat}
> import java.util.Arrays;
> import org.apache.logging.log4j.LogManager;
> public class TestBufferOverflow {
> public static void main(String[] args) {
> final String longMessage;
> {
> char[] chars = new char[384 * 1024];
> Arrays.fill(chars, 'x');
> longMessage = new String(chars);
> }
> LogManager.getLogger("TestBufferOverflow").info(longMessage);
> }
> }
> {noformat}
> ----
> *log4j2.xml*
> {noformat}
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration>
> <appenders>
> <FastFile name="file" fileName="test.log" suppressExceptions="false">
> <PatternLayout>
> <pattern>%m%n</pattern>
> </PatternLayout>
> </FastFile>
> </appenders>
> <loggers>
> <root level="info">
> <appender-ref ref="file" />
> </root>
> </loggers>
> </configuration>
> {noformat}
> ----
> *Exception thrown*
> {noformat}
> Exception in thread "main"
> org.apache.logging.log4j.core.appender.AppenderRuntimeException: An exception
> occurred processing Appender file
> at
> org.apache.logging.log4j.core.appender.DefaultErrorHandler.error(DefaultErrorHandler.java:73)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:104)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:424)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:405)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:366)
> at org.apache.logging.log4j.core.Logger.log(Logger.java:110)
> at
> org.apache.logging.log4j.spi.AbstractLogger.info(AbstractLogger.java:1010)
> at TestBufferOverflow.main(TestBufferOverflow.java:16)
> Caused by: java.nio.BufferOverflowException
> at java.nio.HeapByteBuffer.put(HeapByteBuffer.java:165)
> at
> org.apache.logging.log4j.core.appender.FastFileManager.write(FastFileManager.java:89)
> at
> org.apache.logging.log4j.core.appender.OutputStreamManager.write(OutputStreamManager.java:129)
> at
> org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.append(AbstractOutputStreamAppender.java:113)
> at
> org.apache.logging.log4j.core.appender.FastFileAppender.append(FastFileAppender.java:84)
> at
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:102)
> ... 6 more
> {noformat}
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