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Hudson commented on HADOOP-10353: --------------------------------- SUCCESS: Integrated in Hadoop-Mapreduce-trunk #1712 (See [https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1712/]) HADOOP-10353. Correct CHANGES.txt. (cnauroth: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1572680) * /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt HADOOP-10353. FsUrlStreamHandlerFactory is not thread safe. Contributed by Tudor Scurtu. (cnauroth: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1572679) * /hadoop/common/trunk/hadoop-common-project/hadoop-common/CHANGES.txt * /hadoop/common/trunk/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/FsUrlStreamHandlerFactory.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestUrlStreamHandler.java * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/fs/TestUrlStreamHandlerFactory.java > FsUrlStreamHandlerFactory is not thread safe > -------------------------------------------- > > Key: HADOOP-10353 > URL: https://issues.apache.org/jira/browse/HADOOP-10353 > Project: Hadoop Common > Issue Type: Bug > Components: fs > Affects Versions: 2.3.0 > Reporter: Tudor Scurtu > Assignee: Tudor Scurtu > Labels: race-condition > Fix For: 3.0.0, 2.4.0 > > Attachments: HADOOP-10353.patch, HADOOP-10353.v2.patch > > > The {{FsUrlStreamHandlerFactory}} class uses a plain {{HashMap}} for caching. > When the number of inserted values exceeds the the map's load threshold, it > triggers a rehash. During this time, a different thread that performs a get > operation on a previously inserted key can obtain a null value instead of the > actual value associated with that key. > The result is a NPE potentially being thrown when calling > {{FsUrlStreamHandlerFactory#createURLStreamHandler(String protocol)}} > concurrently. -- This message was sent by Atlassian JIRA (v6.1.5#6160)