GitHub user lins05 opened a pull request:
https://github.com/apache/spark/pull/15377
[SPARK-17802] Improved caller context logging.
## What changes were proposed in this pull request?
[SPARK-16757](https://issues.apache.org/jira/browse/SPARK-16757) sets the
hadoop `CallerContext` when calling hadoop/hdfs apis to make spark applications
more diagnosable in hadoop/hdfs logs. However, the
`org.apache.hadoop.ipc.CallerContext` class is only added since [hadoop
2.8](https://issues.apache.org/jira/browse/HDFS-9184). So each time
`utils.CallerContext.setCurrentContext()` is called (e.g [when a task is
created](https://github.com/apache/spark/blob/b678e46/core/src/main/scala/org/apache/spark/scheduler/Task.scala#L95-L96)),
a "java.lang.ClassNotFoundException: org.apache.hadoop.ipc.CallerContext"
error is logged, which pollutes the spark logs when there are lots of tasks.
This patch improves this behaviour by only logging the
`ClassNotFoundException` once.
## How was this patch tested?
Existing tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lins05/spark
spark-17802-improve-callercontext-logging
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/15377.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #15377
----
commit b8621ab361966c6a63015ae08b0f63985db25176
Author: Shuai Lin <linshuai2...@gmail.com>
Date: 2016-10-06T03:18:20Z
[SPARK-17802] Improved caller context logging.
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