Ufuk Celebi created FLINK-5207:
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Summary: Decrease HadoopFileSystem logging
Key: FLINK-5207
URL:
https://issues.apache.org/jira/browse/FLINK-5207 Project: Flink
Issue Type: Improvement
Reporter: Ufuk Celebi
HadoopFileSystem logging is very noisy when trying to get the Hadoop configuration, which happens for every HadoopFileSystem. This happens for example when a checkpoint is written to HDFS in case of HA.
1) Two log messages relate to the user config:
{code}
final String hdfsDefaultPath = GlobalConfiguration.getString(ConfigConstants.HDFS_DEFAULT_CONFIG, null);
if (hdfsDefaultPath != null) {
retConf.addResource(new org.apache.hadoop.fs.Path(hdfsDefaultPath));
} else {
LOG.debug("Cannot find hdfs-default configuration file");
}
{code}
Since this is reflected in the logged configuration properties, it is mostly unnecessary to log over and over again. Therefore I propose to go with TRACE.
(2) Two log messages relate to the default config files of Hadoop. There I would change the debug message to happen only when they are *not* found. If it is still too noisy, we could completely remove it or decrease to TRACE at another time.
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