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Hadoop QA commented on HADOOP-10048: ------------------------------------ {color:red}-1 overall{color}. Here are the results of testing the latest attachment http://issues.apache.org/jira/secure/attachment/12609909/HADOOP-10048.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}. There were no new javadoc 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:red}-1 core tests{color}. The following test timeouts occurred in hadoop-common-project/hadoop-common: org.apache.hadoop.http.TestHttpServer {color:green}+1 contrib tests{color}. The patch passed contrib unit tests. Test results: https://builds.apache.org/job/PreCommit-HADOOP-Build/4202//testReport/ Console output: https://builds.apache.org/job/PreCommit-HADOOP-Build/4202//console This message is automatically generated. > LocalDirAllocator should avoid holding locks while accessing the filesystem > --------------------------------------------------------------------------- > > Key: HADOOP-10048 > URL: https://issues.apache.org/jira/browse/HADOOP-10048 > Project: Hadoop Common > Issue Type: Improvement > Affects Versions: 2.3.0 > Reporter: Jason Lowe > Assignee: Jason Lowe > Attachments: HADOOP-10048.patch > > > As noted in MAPREDUCE-5584 and HADOOP-7016, LocalDirAllocator can be a > bottleneck for multithreaded setups like the ShuffleHandler. We should > consider moving to a lockless design or minimizing the critical sections to a > very small amount of time that does not involve I/O operations. -- This message was sent by Atlassian JIRA (v6.2#6252)