Arpit Agarwal created HADOOP-10413:
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Summary: Log statements must include pid and tid information
Key: HADOOP-10413
URL: https://issues.apache.org/jira/browse/HADOOP-10413
Project: Hadoop Common
Issue Type: Improvement
Affects Versions: 2.3.0, 3.0.0
Reporter: Arpit Agarwal
Log statements do not include process IDs and thread IDs which makes debugging
hard when the output of multiple requests is interleaved. It's even worse when
looking at the output of test runs because the logs from multiple daemons are
interleaved in the same file.
Log4j does not provide a builtin mechanism for this, so we'd likely have to
write some extra code. One possible solution is to initialize the IDs in the
[MDC|https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/MDC.html]
and extract by updating the {{ConversionPattern}} as [described
here|http://stackoverflow.com/a/12202124].
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