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Nigel Daley (JIRA) |
at Mar 28, 2008 at 7:48 pm
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https://issues.apache.org/jira/browse/HADOOP-3104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12583166#action_12583166 ]
Nigel Daley commented on HADOOP-3104:
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Hudson is down right now. The machine is getting new memory.
In the interest of time, I ran the test-patch target on this. Here's the output:
-1 overall.
@author +1. The patch does not contain any @author tags.
tests included +1. The patch appears to include 3 new or modified tests.
javadoc +1. The javadoc tool did not generate any warning messages.
javac -1. The applied patch generated 568 javac compiler warnings (more than the trunk's current 567 warnings).
findbugs +1. The patch does not introduce any new Findbugs warnings.
The javac issue is that a new private class does not have a serialVersionUID which is acceptable.
MultithreadMapRunner keeps consuming records even if trheads are not available
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Key: HADOOP-3104
URL:
https://issues.apache.org/jira/browse/HADOOP-3104Project: Hadoop Core
Issue Type: Bug
Affects Versions: 0.16.1
Environment: all
Reporter: Alejandro Abdelnur
Assignee: Alejandro Abdelnur
Priority: Critical
Fix For: 0.16.2
Attachments: patch3104-2.txt, patch3104.txt, patch3104.txt
The ExecutorService execute() method does not block when there are not threads available, it queues up the runnables until there are threads.
The problem is that all key/values are read and kept in memory for the task, with large datasets this will create a OOM exception.
Have to figure out how to use the execute in blocking fashion.
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