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https://issues.apache.org/jira/browse/HDFS-776?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13207102#comment-13207102
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Hudson commented on HDFS-776:
-----------------------------
Integrated in Hadoop-Common-trunk-Commit #1720 (See
[https://builds.apache.org/job/Hadoop-Common-trunk-Commit/1720/])
HDFS-776. Fix exception handling in Balancer. Contributed by Uma
Maheswara Rao G (Revision 1243654)
Result = SUCCESS
szetszwo :
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1243654
Files :
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/balancer/NameNodeConnector.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/balancer/TestBalancerWithMultipleNameNodes.java
> Fix exception handling in Balancer
> ----------------------------------
>
> Key: HDFS-776
> URL: https://issues.apache.org/jira/browse/HDFS-776
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: balancer
> Reporter: Owen O'Malley
> Assignee: Uma Maheswara Rao G
> Priority: Critical
> Fix For: 0.24.0, 0.23.2
>
> Attachments: HDFS-776.0.patch, HDFS-776.patch, HDFS-776.patch,
> HDFS-776.patch, HDFS-776.patch
>
>
> The Balancer's AccessKeyUpdater handles exceptions badly. In particular:
> 1. Catching Exception too low. The wrapper around setKeys should only catch
> IOException.
> 2. InterruptedException is ignored. It should be caught at the top level and
> exit run.
> 3. Throwable is not caught. It should be caught at the top level and kill the
> Balancer server process.
> {code}
> class AccessKeyUpdater implements Runnable {
> public void run() {
> while (shouldRun) {
> try {
> accessTokenHandler.setKeys(namenode.getAccessKeys());
> } catch (Exception e) {
> LOG.error(StringUtils.stringifyException(e));
> }
> try {
> Thread.sleep(keyUpdaterInterval);
> } catch (InterruptedException ie) {
> }
> }
> }
> }
> {code}
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