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[MAPREDUCE-5975] Fix native-task build on Ubuntu 13.10 - MapReduce - [issue]
...I'm having some issues building the native-task branch on my Ubuntu 13.10 box. This JIRA is to figure out and fix whatever's going on....
http://issues.apache.org/jira/browse/MAPREDUCE-5975    Author: Todd Lipcon, 2014-07-22, 21:09
[MAPREDUCE-5978] native-task CompressTest failure on Ubuntu - MapReduce - [issue]
...The MR-2841 branch fails the following unit tests on my box:  CompressTest.testBzip2Compress:84 file compare result: if they are the same ,then return true expected:<true> bu...
http://issues.apache.org/jira/browse/MAPREDUCE-5978    Author: Todd Lipcon, 2014-07-22, 05:37
[MAPREDUCE-496] If mapred.local.dir is configured on top of dfs.data.dir, hadoop should refuse to start rather than deleting the contents of local.dir - MapReduce - [issue]
...I just managed to blow away a DFS by accidentally misconfiguring dfs.data.dir and mapred.local.dir to contain several directories in common. On startup, the task tracker clears out mapred.lo...
http://issues.apache.org/jira/browse/MAPREDUCE-496    Author: Todd Lipcon, 2014-07-21, 18:04
[MAPREDUCE-5962] Support CRC32C in IFile - MapReduce - [issue]
...Currently, the IFile format used by the MR shuffle checksums all data using the zlib CRC32 polynomial. If we allow use of CRC32C instead, we can get a large reduction in CPU usage by leverag...
http://issues.apache.org/jira/browse/MAPREDUCE-5962    Author: Todd Lipcon, 2014-07-18, 16:40
[MAPREDUCE-5977] Fix or suppress native-task gcc warnings - MapReduce - [issue]
...Currently, building the native task code on gcc 4.8 has a fair number of warnings. We should fix or suppress them so that new warnings are easier to see....
http://issues.apache.org/jira/browse/MAPREDUCE-5977    Author: Todd Lipcon, 2014-07-17, 19:00
Making a branch for MR-2841 (native sort) - MapReduce - [mail # dev]
...Hi all,I'm planning to create a new branch for MAPREDUCE-2841, a nativeimplementation of the map output collector (aka mapside sort). There weresome concerns initially raised on the JIRA, bu...
   Author: Todd Lipcon, 2014-07-07, 16:29
[MAPREDUCE-2386] TT jetty server stuck in tight loop around epoll_wait - MapReduce - [issue]
...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...
http://issues.apache.org/jira/browse/MAPREDUCE-2386    Author: Todd Lipcon, 2014-07-07, 10:39
[MAPREDUCE-3191] docs for map output compression incorrectly reference SequenceFile - MapReduce - [issue]
...The documentation currently says that map output compression uses SequenceFile compression. This hasn't been true in several years, since we use IFile for intermediate data now....
http://issues.apache.org/jira/browse/MAPREDUCE-3191    Author: Todd Lipcon, 2014-06-30, 09:18
[MAPREDUCE-5821] IFile merge allocates new byte array for every value - MapReduce - [issue]
...I wrote a standalone benchmark of the MapOutputBuffer and found that it did a lot of allocations during the merge phase. After looking at an allocation profile, I found that IFile.Reader.nex...
http://issues.apache.org/jira/browse/MAPREDUCE-5821    Author: Todd Lipcon, 2014-06-30, 09:18
[MAPREDUCE-2980] Fetch failures and other related issues in Jetty 6.1.26 - MapReduce - [issue]
...Since upgrading Jetty from 6.1.14 to 6.1.26 we've had a ton of HTTP-related issues, including: Much higher incidence of fetch failures A few strange file-descriptor related bugs (eg MAPREDUC...
http://issues.apache.org/jira/browse/MAPREDUCE-2980    Author: Todd Lipcon, 2014-04-03, 11:17
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