Steve Loughran created HADOOP-18999:
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Summary: S3A: debug logging for http traffic to S3 stores
Key: HADOOP-18999
URL: https://issues.apache.org/jira/browse/HADOOP-18999
Project: Hadoop Common
Issue Type: Sub-task
Components: fs/s3
Affects Versions: 3.4.0
Reporter: Steve Loughran
Assignee: Steve Loughran
AWS SDK bundle.jar logging doesn't set up right.
{code}
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further
details.
{code}
Cloudstore commands have a -debug option to force set this through log4j APIs;
this does work.
Proposed:
* add reflection-based ability to set/query log4j log levels (+tests, obviously)
* add a new log `org.apache.hadoop.fs.s3a.logging.sdk`
* if set to DEBUG, DefaultS3ClientFactory will enable logging on the aws
internal/shaded classes
this allows log4j.properties to turn on logging; reflection ensures all is well
on other log back-ends and when unshaded aws sdk jars are in use
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