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[HDFS-6776] distcp from insecure cluster (source) to secure cluster (destination) doesn't work via webhdfs - HDFS - [issue]
...Issuing distcp command at the secure cluster side, trying to copy stuff from insecure cluster to secure cluster, and see the following problem:hadoopuser@yjc5u-1 ~]$ hadoop distcp webhdfs://...
http://issues.apache.org/jira/browse/HDFS-6776    Author: Yongjun Zhang, 2014-09-06, 16:39
[HDFS-7000] TestWebHdfsFileSystemContract failed with OutOfMemoryError but the real reason is not - HDFS - [issue]
...TestWebHdfsFileSystemContract failed with the following error. But the real reason is not. Instead, it's because of "max user processes" of ulimit setting is too low. Need a more informative...
http://issues.apache.org/jira/browse/HDFS-7000    Author: Yongjun Zhang, 2014-09-05, 17:31
[HDFS-6578] add toString method to DatanodeStorage for easier debugging - HDFS - [issue]
...It seems to be nice to add a toString() method for DatanodeStorage class, so we can print out its key info easier while doing debuging.Another thing is, in the end of BlockManager#processRep...
http://issues.apache.org/jira/browse/HDFS-6578    Author: Yongjun Zhang, 2014-09-03, 21:34
[HDFS-6972] TestRefreshUserMappings.testRefreshSuperUserGroupsConfiguration doesn't decode url correctly - HDFS - [issue]
...https://builds.apache.org/job/PreCommit-HDFS-Build/7846/consoleFull[INFO] Surefire report directory: /home/jenkins/jenkins-slave/workspace/PreCommit-HDFS-Build@2/hadoop-hdfs-project/hadoop-h...
http://issues.apache.org/jira/browse/HDFS-6972    Author: Yongjun Zhang, 2014-08-30, 17:47
[HDFS-6694] TestPipelinesFailover.testPipelineRecoveryStress tests fail intermittently with various symptoms - HDFS - [issue]
...TestPipelinesFailover.testPipelineRecoveryStress tests fail intermittently with various symptoms. Typical failures are described in first comment....
http://issues.apache.org/jira/browse/HDFS-6694    Author: Yongjun Zhang, 2014-08-28, 16:43
[HDFS-6937] Another issue in handling checksum errors in write pipeline - HDFS - [issue]
...Given a write pipeline:DN1 -> DN2 -> DN3DN3 detected cheksum error and terminate, DN2 truncates its replica to the ACKed size. Then a new pipeline is attempted asDN1 -> DN2 -> DN...
http://issues.apache.org/jira/browse/HDFS-6937    Author: Yongjun Zhang, 2014-08-25, 22:51
[HDFS-6825] Edit log corruption due to delayed block removal - HDFS - [issue]
...Observed the following stack:2014-08-04 23:49:44,133 INFO org.apache.hadoop.hdfs.server.namenode.FSNamesystem: commitBlockSynchronization(lastblock=BP-.., newgenerationstamp=..., newlength=....
http://issues.apache.org/jira/browse/HDFS-6825    Author: Yongjun Zhang, 2014-08-20, 01:01
[HDFS-6403] Add metrics for log warnings reported by JVM pauses - HDFS - [issue]
...HADOOP-9618 logs warnings when there are long GC pauses. If this is exposed as a metric, then they can be monitored....
http://issues.apache.org/jira/browse/HDFS-6403    Author: Yongjun Zhang, 2014-08-15, 06:41
Re: [VOTE] Release Apache Hadoop 2.5.0 RC2 - HDFS - [mail # dev]
...+1 (non-binding), pending the document issue Akira found out+ downloaded src tarball and did build+ deployed two pseudo-distributed clusters+ ran some sample mapreduce job on one cluster+ ra...
   Author: Yongjun Zhang, 2014-08-11, 06:53
[HDFS-6788] Improve synchronization in BPOfferService with read write lock - HDFS - [issue]
...Threads in DN (DataXceiver, PacketResponder, Async disk worker etc) may block at BPOfferService.getBlockPoolId() when calling BPOfferService.checkBlock(), though they are just reading the sa...
http://issues.apache.org/jira/browse/HDFS-6788    Author: Yongjun Zhang, 2014-08-02, 15:56
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