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[HDFS-6776] distcp from insecure cluster (source) to secure cluster (destination) doesn't work - 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, 2014-08-22, 23:52
[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, 2014-08-20, 21:42
[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
[HDFS-6588] Investigating removing getTrueCause method in Server.java - HDFS - [issue]
...When addressing Daryn Sharp's comment for HDFS-6475 quoted below:What I'm saying is I think the patch adds too much unnecessary code. Filing an improvement to delete all but a few lines of t...
http://issues.apache.org/jira/browse/HDFS-6588    Author: Yongjun Zhang, 2014-07-24, 00:14
[HDFS-6719] org.apache.hadoop.fs.TestDFVariations.testMount failed intermittently because specified path doesn't exist - HDFS - [issue]
...Failure message:Error MessageSpecified path /home/jenkins/jenkins-slave/workspace/PreCommit-HDFS-Build/trunk/hadoop-common-project/hadoop-common/target/test/datadoes not existStacktracejava....
http://issues.apache.org/jira/browse/HDFS-6719    Author: Yongjun Zhang, 2014-07-23, 19:45
[HDFS-6707] Intermittent failure of Symlink tests TestSymlinkLocalFSFileContext,TestSymlinkLocalFSFileSystem - HDFS - [issue]
...Symlink tests failure happened from time to time,https://builds.apache.org/job/PreCommit-HDFS-Build/7383//testReport/https://builds.apache.org/job/PreCommit-HDFS-Build/7376/testReport/Failed...
http://issues.apache.org/jira/browse/HDFS-6707    Author: Yongjun Zhang, 2014-07-21, 19:28
[HDFS-6632] Reintroduce dfs.http.port / dfs.https.port in branch-2 - HDFS - [issue]
...Filing this JIRA per Aaron T. Myers and Haohui Mai's discussion in HDFS-5321 (Thanks both of you), to remove the incompatibility introduced by HDFS-5321. The idea is to put dfs.http.port and...
http://issues.apache.org/jira/browse/HDFS-6632    Author: Yongjun Zhang, 2014-07-18, 22:23
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