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Posted to hdfs-dev@hadoop.apache.org by "Denny Ye (JIRA)" <ji...@apache.org> on 2011/07/21 09:35:58 UTC
[jira] [Resolved] (HDFS-2176) Avoid ConcurrentModificationException
when FSImage initialization
[ https://issues.apache.org/jira/browse/HDFS-2176?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Denny Ye resolved HDFS-2176.
----------------------------
Resolution: Not A Problem
Break when removing can avoid the ConcurrentModicationException. It's my fault, Sorry!
> Avoid ConcurrentModificationException when FSImage initialization
> -----------------------------------------------------------------
>
> Key: HDFS-2176
> URL: https://issues.apache.org/jira/browse/HDFS-2176
> Project: Hadoop HDFS
> Issue Type: Improvement
> Affects Versions: 0.21.0
> Reporter: Denny Ye
> Priority: Minor
> Labels: FSImage
>
> Below code may cause ConcurrentModificationException when some of fsimage directory equals editlog directory :
> Method: FSImage.setStorageDirectories(Collection<URI> fsNameDirs, Collection<URI> fsEditsDirs)
> Code:
> for (URI dirName : fsNameDirs) {
> ...
> boolean isAlsoEdits = false;
> for (URI editsDirName : fsEditsDirs) {
> if (editsDirName.compareTo(dirName) == 0) {
> isAlsoEdits = true;
> fsEditsDirs.remove(editsDirName);
> break;
> }
> }
> }
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