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https://issues.apache.org/jira/browse/HADOOP-18631?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17691901#comment-17691901
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ASF GitHub Bot commented on HADOOP-18631:
-----------------------------------------
virajjasani commented on code in PR #5418:
URL: https://github.com/apache/hadoop/pull/5418#discussion_r1113789406
##########
hadoop-hdfs-project/hadoop-hdfs/src/test/resources/log4j.properties:
##########
@@ -49,4 +56,24 @@ log4j.appender.DNMETRICSRFA.MaxBackupIndex=1
log4j.appender.DNMETRICSRFA.MaxFileSize=64MB
# Supress KMS error log
-log4j.logger.com.sun.jersey.server.wadl.generators.WadlGeneratorJAXBGrammarGenerator=OFF
\ No newline at end of file
+log4j.logger.com.sun.jersey.server.wadl.generators.WadlGeneratorJAXBGrammarGenerator=OFF
+
+#
+# hdfs audit logging
+#
+
+# TODO : log4j2 properties to provide example for using Async appender with
other appenders
+hdfs.audit.logger=INFO,ASYNCAPPENDER,RFAAUDIT
+hdfs.audit.log.maxfilesize=256MB
+hdfs.audit.log.maxbackupindex=20
+log4j.logger.org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit=${hdfs.audit.logger}
+log4j.additivity.org.apache.hadoop.hdfs.server.namenode.FSNamesystem.audit=false
+log4j.appender.RFAAUDIT=org.apache.log4j.RollingFileAppender
+log4j.appender.RFAAUDIT.File=${hadoop.log.dir}/hdfs-audit.log
+log4j.appender.RFAAUDIT.layout=org.apache.log4j.PatternLayout
+log4j.appender.RFAAUDIT.layout.ConversionPattern=%m%n
+log4j.appender.RFAAUDIT.MaxFileSize=${hdfs.audit.log.maxfilesize}
+log4j.appender.RFAAUDIT.MaxBackupIndex=${hdfs.audit.log.maxbackupindex}
+log4j.appender.ASYNCAPPENDER=org.apache.log4j.AsyncAppender
Review Comment:
We can introduce custom Async appender that wraps RFA:
```
public class AsyncRFAAppender extends AsyncAppender {
private long maxFileSize = 10*1024*1024;
private int maxBackupIndex = 1;
private long nextRollover = 0;
protected String fileName = null;
private boolean addRfaToAsync = false;
public void append(final LoggingEvent event) {
super.append(event);
}
public void setBlocking(final boolean value) {
addRfaToAsync = true;
RFA rfa = new RFA(values); // maxFileSize, maxBackupIndex etc
this.addAppender(rfa);
}
}
```
But this will be temporary only as log4j2 needs rework anyways.
WDYT? Shall we introduce new custom appender for temporary time duration?
> Migrate Async appenders to log4j properties
> -------------------------------------------
>
> Key: HADOOP-18631
> URL: https://issues.apache.org/jira/browse/HADOOP-18631
> Project: Hadoop Common
> Issue Type: Sub-task
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
>
> Before we can upgrade to log4j2, we need to migrate async appenders that we
> add "dynamically in the code" to the log4j.properties file. Instead of using
> core/hdfs site configs, log4j properties or system properties should be used
> to determine if the given logger should use async appender.
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