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[HDFS-7281] Missing block is marked as corrupted block - HDFS - [issue]
...In the situation where the block lost all its replicas, fsck shows the block is missing as well as corrupted. Perhaps it is better not to mark the block corrupted in this case. The reason it...
http://issues.apache.org/jira/browse/HDFS-7281    Author: Ming Ma, 2015-05-02, 16:34
[HDFS-7401] Add block info to DFSInputStream' WARN message when it adds node to deadNodes - HDFS - [issue]
...Block info is missing in the below message2014-11-14 03:59:00,386 WARN org.apache.hadoop.hdfs.DFSClient: Failed to connect to /xx.xx.xx.xxx:50010 for block, add to deadNodes and continue. ja...
http://issues.apache.org/jira/browse/HDFS-7401    Author: Ming Ma, 2015-05-02, 06:12
[HDFS-5757] refreshNodes with many nodes at the same time could slow down NN - HDFS - [issue]
...Sometimes we need to decomm a whole rack of nodes at the same time. When the decomm is in process; NN is slow.The reason is when DecommissionManager checks the decomm status, it acquires nam...
http://issues.apache.org/jira/browse/HDFS-5757    Author: Ming Ma, 2015-05-02, 06:11
[HDFS-7123] Run legacy fsimage checkpoint in parallel with PB fsimage checkpoint - HDFS - [issue]
...HDFS-7097 will address the checkpoint and BR issue. In addition, it might still be useful to reduce the overall checkpoint duration, given it blocks edit log replay. If there is large volume...
http://issues.apache.org/jira/browse/HDFS-7123    Author: Ming Ma, 2015-05-02, 06:11
[HDFS-7442] Optimization for decommission-in-progress check - HDFS - [issue]
...1. {{isReplicationInProgress }} currently rescan all blocks of a given node each time the method is called; it becomes less efficient as more of its blocks become fully replicated. Each scan...
http://issues.apache.org/jira/browse/HDFS-7442    Author: Ming Ma, 2015-05-01, 20:52
[HDFS-6697] Make NN lease soft and hard limits configurable - HDFS - [issue]
...For testing, NameNodeAdapter allows test code to specify lease soft and hard limit via setLeasePeriod directly on LeaseManager. But NamenodeProxies.java still use the default values.It is us...
http://issues.apache.org/jira/browse/HDFS-6697    Author: Ming Ma, 2015-05-01, 19:24
[HDFS-8056] Decommissioned dead nodes should continue to be counted as dead after NN restart - HDFS - [issue]
...We had some offline discussion with Andrew Wang and Colin Patrick McCabe about this. Bring this up for more input and get the patch in place.Dead nodes are tracked by DatanodeManager's datan...
http://issues.apache.org/jira/browse/HDFS-8056    Author: Ming Ma, 2015-04-29, 00:37
[HDFS-6478] RemoteException can't be retried properly for non-HA scenario - HDFS - [issue]
...For HA case, the call stack is DFSClient -> RetryInvocationHandler -> ClientNamenodeProtocolTranslatorPB -> ProtobufRpcEngine. ProtobufRpcEngine. ProtobufRpcEngine throws ServiceExc...
http://issues.apache.org/jira/browse/HDFS-6478    Author: Ming Ma, 2015-04-27, 19:39
[HDFS-7993] Provide each Replica details in fsck - HDFS - [issue]
...When you run fsck with "-files" or "-racks", you will get something like below if one of the replicas is decommissioned.blk_x len=y repl=3 [dn1, dn2, dn3, dn4]That is because in NamenodeFsck...
http://issues.apache.org/jira/browse/HDFS-7993    Author: Ming Ma, 2015-04-21, 16:37
[HDFS-8025] Addendum fix for HDFS-3087 Decomissioning on NN restart can complete without blocks being replicated - HDFS - [issue]
...Per discussion with Andrew Wang on HDFS-7411, we should include HDFS-3087 and enhance the unit test....
http://issues.apache.org/jira/browse/HDFS-8025    Author: Ming Ma, 2015-04-13, 16:14
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NEW: Monitor These Apps!
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