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https://issues.apache.org/jira/browse/HADOOP-10146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13872529#comment-13872529
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Hadoop QA commented on HADOOP-10146:
------------------------------------
{color:red}-1 overall{color}. Here are the results of testing the latest
attachment
http://issues.apache.org/jira/secure/attachment/12623195/HADOOP-10146.patch
against trunk revision .
{color:green}+1 @author{color}. The patch does not contain any @author
tags.
{color:red}-1 tests included{color}. The patch doesn't appear to include
any new or modified tests.
Please justify why no new tests are needed for this
patch.
Also please list what manual steps were performed to
verify this patch.
{color:green}+1 javac{color}. The applied patch does not increase the
total number of javac compiler warnings.
{color:green}+1 javadoc{color}. The javadoc tool did not generate any
warning messages.
{color:green}+1 eclipse:eclipse{color}. The patch built with
eclipse:eclipse.
{color:green}+1 findbugs{color}. The patch does not introduce any new
Findbugs (version 1.3.9) warnings.
{color:green}+1 release audit{color}. The applied patch does not increase
the total number of release audit warnings.
{color:green}+1 core tests{color}. The patch passed unit tests in
hadoop-common-project/hadoop-common.
{color:green}+1 contrib tests{color}. The patch passed contrib unit tests.
Test results:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3436//testReport/
Console output:
https://builds.apache.org/job/PreCommit-HADOOP-Build/3436//console
This message is automatically generated.
> Workaround JDK7 Process fd close bug
> ------------------------------------
>
> Key: HADOOP-10146
> URL: https://issues.apache.org/jira/browse/HADOOP-10146
> Project: Hadoop Common
> Issue Type: Bug
> Components: util
> Affects Versions: 0.23.0, 2.0.0-alpha, 3.0.0
> Reporter: Daryn Sharp
> Assignee: Daryn Sharp
> Priority: Critical
> Attachments: HADOOP-10129.branch-23.patch, HADOOP-10129.patch,
> HADOOP-10146.branch-23.patch, HADOOP-10146.patch
>
>
> JDK7's {{Process}} output streams have an async fd-close race bug. This
> manifests as commands run via o.a.h.u.Shell causing threads to hang, OOM, or
> cause other bizarre behavior. The NM is likely to encounter the bug under
> heavy load.
> Specifically, {{ProcessBuilder}}'s {{UNIXProcess}} starts a thread to reap
> the process and drain stdout/stderr to avoid a lingering zombie process. A
> race occurs if the thread using the stream closes it, the underlying fd is
> recycled/reopened, while the reaper is draining it.
> {{ProcessPipeInputStream.drainInputStream}}'s will OOM allocating an array if
> {{in.available()}} returns a huge number, or may wreak havoc by incorrectly
> draining the fd.
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