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[HDFS-8871] Decommissioning of a node with a failed volume may not start - HDFS - [issue]
...Since staleness may not be properly cleared, a node with a failed volume may not actually get scanned for block replication. Nothing is being replicated from these nodes.This bug does not ma...
http://issues.apache.org/jira/browse/HDFS-8871    Author: Kihwal Lee, 2015-11-30, 18:00
[HDFS-9445] Deadlock in datanode - HDFS - [issue]
...Found one Java-level deadlock:============================="DataXceiver for client DFSClient_attempt_xxx at / [Sending block BP-xxxxx:blk_123_456]":  waiting to lock monitor ...
http://issues.apache.org/jira/browse/HDFS-9445    Author: Kihwal Lee, 2015-11-26, 13:36
[HDFS-9426] Rollingupgrade finalization is not backward compatible - HDFS - [issue]
...After HDFS-7645, the namenode can return non-null rollingUpgradeInfo in heatbeat reponses. 2.7.1 or 2.6.x datanodes won't finalize the upgrade because it's not null.NN might have to check th...
http://issues.apache.org/jira/browse/HDFS-9426    Author: Kihwal Lee, 2015-11-26, 12:25
[HDFS-4861] BlockPlacementPolicyDefault does not consider decommissioning racks - HDFS - [issue]
...getMaxNodesPerRack() calculates the max replicas/rack like this:int maxNodesPerRack = (totalNumOfReplicas-1)/clusterMap.getNumOfRacks()+2;Since this does not consider the racks that are bein...
http://issues.apache.org/jira/browse/HDFS-4861    Author: Kihwal Lee, 2015-11-25, 17:26
[HDFS-8676] Delayed rolling upgrade finalization can cause heartbeat expiration and write failures - HDFS - [issue]
...In big busy clusters where the deletion rate is also high, a lot of blocks can pile up in the datanode trash directories until an upgrade is finalized.  When it is finally finalized, th...
http://issues.apache.org/jira/browse/HDFS-8676    Author: Kihwal Lee, 2015-11-23, 22:52
[HDFS-8995] Flaw in registration bookeeping can make DN die on reconnect - HDFS - [issue]
...Normally data nodes re-register with the namenode when it was unreachable for more than the heartbeat expiration and becomes reachable again. Datanodes keep retrying the last rpc call such a...
http://issues.apache.org/jira/browse/HDFS-8995    Author: Kihwal Lee, 2015-11-20, 23:53
[HDFS-9106] Transfer failure during pipeline recovery causes permanent write failures - HDFS - [issue]
...When a new node is added to a write pipeline during flush/sync, if the partial block transfer fails, the write will fail permanently without retrying or continuing with whatever is in the pi...
http://issues.apache.org/jira/browse/HDFS-9106    Author: Kihwal Lee, 2015-11-20, 23:50
[HDFS-9178] Slow datanode I/O can cause a wrong node to be marked bad - HDFS - [issue]
...When non-leaf datanode in a pipeline is slow on or stuck at disk I/O, the downstream node can timeout on reading packet since even the heartbeat packets will not be relayed down.  The p...
http://issues.apache.org/jira/browse/HDFS-9178    Author: Kihwal Lee, 2015-11-20, 23:48
[HDFS-9396] Total files and directories on jmx and web UI on standby is uninitialized - HDFS - [issue]
...After HDFS-6763, the quota on the standby namenode is not being updated until it transitions to active. This causes the jmx and the web ui files and dir count to be uninitialized or unupdate...
http://issues.apache.org/jira/browse/HDFS-9396    Author: Kihwal Lee, 2015-11-12, 04:59
[HDFS-9383] TestByteArrayManager#testByteArrayManager fails - HDFS - [issue]
...This was seen in the trunk buildshttps://builds.apache.org/job/Hadoop-Hdfs-trunkRunning org.apache.hadoop.hdfs.util.TestByteArrayManagerTests run: 3, Failures: 1, Errors: 0, Skipped: 0, Time...
http://issues.apache.org/jira/browse/HDFS-9383    Author: Kihwal Lee, 2015-11-09, 17:33
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elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB