Arun C Murthy
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[HADOOP-14669] GenericTestUtils.waitFor should use monotonic time
...GenericTestUtils.waitFor should be calling Time.monotonicNow rather than Time.now. Otherwise if the system clock adjusts during unit testing the timeout period could be incorrect....
, 2017-07-19, 15:06
- [mail # dev]
...I think we are OK to leave support for the zstd codec in the Hadoop code base. I asked Chris Mattman for clarification, noting that the support for the zstd codec requires the user to ...
, 2017-07-17, 20:30
[HADOOP-14412] HostsFileReader#getHostDetails is very expensive on large clusters
...After upgrading one of our large clusters to 2.8 we noticed many IPC server threads of the resourcemanager spending time in NodesListManager#isValidNode which in turn was calling HostsFileRe...
, 2017-05-17, 03:31
[HADOOP-9069] FileSystem.get leads to stack overflow if default FS is not configured with a scheme
...If fs.defaultFS is configured without a scheme, e.g.: "/", then FileSystem.get will infinitely recurse and lead to a stack overflow. An example stacktrace from 0.23:java.lang.StackOver...
, 2017-05-15, 12:56
[HADOOP-13362] DefaultMetricsSystem leaks the source name when a source unregisters
...Ran across a nodemanager that was spending most of its time in GC. Upon examination of the heap most of the memory was going to the map of names in org.apache.hadoop.metrics2.lib.Uniqu...
, 2017-03-29, 22:15
[VOTE] Release Apache Hadoop 2.8.0 (RC3)
- [mail # dev]
...+1 (binding)- Verfied signatures and digests- Performed a native build from the release tag- Deployed to a single node cluster- Ran some sample jobsJason On Friday, March ...
, 2017-03-17, 22:58
[HADOOP-12706] TestLocalFsFCStatistics#testStatisticsThreadLocalDataCleanUp times out occasionally
...TestLocalFsFCStatistics has been failing sometimes, and when it fails it appears to be from FCStatisticsBaseTest.testStatisticsThreadLocalDataCleanUp. The test is timing out when it fa...
, 2017-01-06, 01:43
[HADOOP-12191] Bzip2Factory is not thread safe
...Bzip2Factory.isNativeBzip2Loaded is not protected from multiple threads calling it simultaneously. A thread can return false from this method despite logging the fact that was going to...
, 2017-01-06, 01:40
[HADOOP-12958] PhantomReference for filesystem statistics can trigger OOM
...I saw an OOM that appears to have been caused by the phantom references introduced for file system statistics management. I'll post details in a followup comment....
, 2017-01-06, 01:02
Updated 2.8.0-SNAPSHOT artifact
- [mail # dev]
...At this point my preference would be to do the most expeditious thing to release 2.8, whether that's sticking with the branch-2.8 we have today or re-cutting it on branch-2. Doing a quick J...
, 2016-11-04, 22:39
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