GitHub user zsxwing opened a pull request:
https://github.com/apache/spark/pull/179
SPARK-1278: Fix improper use of SimpleDateFormat
`SimpleDateFormat` is not immutable and thread-safe. Some places use the
same SimpleDateFormat object without safeguard in the multiple threads. It will
cause that the Web UI displays improper date.
This PR creates `SimpleDateFormat` when it's necessary. Another solution is
using `ThreadLocal` to store a `SimpleDateFormat` in each thread. If this PR
impacts the performance, I can change to the latter one.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/zsxwing/spark SPARK-1278
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/179.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 #179
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commit 5618092d6254c31629affd0107cb0f7ae5de6d5f
Author: zsxwing <zsxw...@gmail.com>
Date: 2014-03-19T07:40:40Z
SPARK-1278: Fix improper use of SimpleDateFormat
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