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[MAPREDUCE-6024] java.net.SocketTimeoutException in Fetcher caused jobs stuck for more than 1 hour - MapReduce - [issue]
...2014-08-04 21:09:42,356 WARN fetcher#33 org.apache.hadoop.mapreduce.task.reduce.Fetcher: Failed to connect to fake.host.name:13562 with 2 map outputsjava.net.SocketTimeoutException: Read tim...
http://issues.apache.org/jira/browse/MAPREDUCE-6024    Author: zhaoyunjiong, 2014-08-20, 01:01
[MAPREDUCE-5495] Make url in JobProfile work when set mapred.job.tracker to 0.0.0.0:<port> - MapReduce - [issue]
...When there are multiple NICs and JobTracker need listen on all NICs, for example when set mapred.job.tracker to 0.0.0.0:8021, then getJobTrackerMachine() will return 0.0.0.0, it cause some p...
http://issues.apache.org/jira/browse/MAPREDUCE-5495    Author: zhaoyunjiong, 2014-05-29, 22:54
[MAPREDUCE-5711] When JobTracker writing JobHistory to HDFS, it may hung for long time due to DataNode error - MapReduce - [issue]
...When writing JobHistory to HDFS, it may takes very long time due to DataNode error, unfortunately, it also hold JobTracker lock, so it makes JobTracker hung for long time. It happens couple ...
http://issues.apache.org/jira/browse/MAPREDUCE-5711    Author: zhaoyunjiong, 2014-01-10, 01:44
[MAPREDUCE-5541] Improved algorithm for whether need speculative task - MapReduce - [issue]
...Most of time, tasks won't start running at same time.In this case hasSpeculativeTask in TaskInProgress not working very well.Some times, some tasks just start running, and scheduler already ...
http://issues.apache.org/jira/browse/MAPREDUCE-5541    Author: zhaoyunjiong, 2013-10-24, 02:45
[MAPREDUCE-5368] Save memory by  set capacity, load factor and concurrency level for ConcurrentHashMap in TaskInProgress - MapReduce - [issue]
...Below is histo from our JobTracker: num     #instances         #bytes  class name----------------------------------------------   1:   ...
http://issues.apache.org/jira/browse/MAPREDUCE-5368    Author: zhaoyunjiong, 2013-08-04, 09:23
[MAPREDUCE-5260] Job failed because of JvmManager running into inconsistent state - MapReduce - [issue]
...In our cluster, jobs failed due to randomly task initialization failed because of JvmManager running into inconsistent state and TaskTracker failed to exit:java.lang.Throwable: Child Error a...
http://issues.apache.org/jira/browse/MAPREDUCE-5260    Author: zhaoyunjiong, 2013-08-04, 09:23
[MAPREDUCE-5415] LeaseRenewer throw java.util.ConcurrentModificationException when timeout - MapReduce - [issue]
...In LeaseRenewer, when renew() throw SocketTimeoutException, c.abort() will remove one dfsclient from dfsclients. Here will throw a ConcurrentModificationException because dfsclients changed ...
http://issues.apache.org/jira/browse/MAPREDUCE-5415    Author: zhaoyunjiong, 2013-07-24, 09:24
[MAPREDUCE-4843] When using DefaultTaskController, JobLocalizer not thread safe - MapReduce - [issue]
...In our cluster, some times job will failed due to below exception:2012-12-03 23:11:54,811 WARN org.apache.hadoop.mapred.TaskTracker: Error initializing attempt_201212031626_1115_r_000023_0:o...
http://issues.apache.org/jira/browse/MAPREDUCE-4843    Author: zhaoyunjiong, 2013-02-04, 22:27
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