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[MAPREDUCE-2376] test-task-controller fails if run as a userid < 1000 - MapReduce - [issue]
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...test-task-controller tries to verify that the task-controller won't run on behalf of users with uid < 1000. This makes the test fail when running in some test environments - eg our hudson...
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http://issues.apache.org/jira/browse/MAPREDUCE-2376
Author: Todd Lipcon,
2012-10-17, 22:59
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[MAPREDUCE-3394] Add log guard for a debug message in ReduceTask - MapReduce - [issue]
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...There's a LOG.debug message in ReduceTask that stringifies a task ID and uses a non-negligible amount of CPU in some cases. We should guard it with isDebugEnabled...
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http://issues.apache.org/jira/browse/MAPREDUCE-3394
Author: Todd Lipcon,
2012-10-17, 19:27
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[MAPREDUCE-2103] task-controller shouldn't require o-r permissions - MapReduce - [issue]
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...The task-controller currently checks that "other" users don't have read permissions. This is unnecessary - we just need to make it's not executable. The debian policy manual explains it well...
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http://issues.apache.org/jira/browse/MAPREDUCE-2103
Author: Todd Lipcon,
2012-10-17, 19:27
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[MAPREDUCE-1740] NPE in getMatchingLevelForNodes when node locations are variable depth - MapReduce - [issue]
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...In getMatchingLevelForNodes, we assume that both nodes have the same "depth" (ie number of path components). If the user provides a topology script that assigns one node a path like /foo/bar...
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http://issues.apache.org/jira/browse/MAPREDUCE-1740
Author: Todd Lipcon,
2012-10-17, 19:27
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[MAPREDUCE-3278] 0.20: avoid a busy-loop in ReduceTask scheduling - MapReduce - [issue]
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...Looking at profiling results, it became clear that the ReduceTask has the following busy-loop which was causing it to suck up 100% of CPU in the fetch phase in some configurations: the numbe...
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http://issues.apache.org/jira/browse/MAPREDUCE-3278
Author: Todd Lipcon,
2012-10-17, 19:27
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[MAPREDUCE-2073] TestTrackerDistributedCacheManager should be up-front about requirements on build environment - MapReduce - [issue]
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...TestTrackerDistributedCacheManager will fail on a system where the build directory is in any path where an ancestor doesn't have a+x permissions. On one of our hudson boxes, for example, hud...
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http://issues.apache.org/jira/browse/MAPREDUCE-2073
Author: Todd Lipcon,
2012-10-17, 19:27
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Re: Question about namenode HA - MapReduce - [mail # user]
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...Hi Liang, Answers inline below. On Sun, Oct 14, 2012 at 8:01 PM, 谢良 w rote: There are a few reasons for this design choice: 1) Like Steve said, it's easie...
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Author: Todd Lipcon,
2012-10-16, 01:24
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[MAPREDUCE-2386] TT jetty server stuck in tight loop around epoll_wait - MapReduce - [issue]
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...In some load testing, I got a TaskTracker into a state where its Jetty server is in a tight loop calling epoll_wait, which is returning EINVAL:[pid 19573] epoll_wait(157, 40829000, 8...
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http://issues.apache.org/jira/browse/MAPREDUCE-2386
Author: Todd Lipcon,
2012-10-04, 10:43
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[MAPREDUCE-3223] Remove MR1 configs from mapred-default.xml - MapReduce - [issue]
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...All of the MRv1 configs are still in mapred-default.xml. This is confusing when trying to make config changes. Since a lot of the input/output format tests still depend on MR1, I'd like to m...
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http://issues.apache.org/jira/browse/MAPREDUCE-3223
Author: Todd Lipcon,
2012-10-02, 14:20
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[MAPREDUCE-782] Use PureJavaCrc32 in mapreduce spills - MapReduce - [issue]
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...HADOOP-6148 implemented a Pure Java implementation of CRC32 which performs better than the built-in one. This issue is to make use of it in the mapred package...
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http://issues.apache.org/jira/browse/MAPREDUCE-782
Author: Todd Lipcon,
2012-09-25, 19:00
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