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[HDFS-1056] Multi-node RPC deadlocks during block recovery - HDFS - [issue]
...Believe it or not, I'm seeing HADOOP-3657 / HADOOP-3673 in a 5-node 0.20 cluster. I have many concurrent writes on the cluster, and when I kill a DN, some percentage of the time I get one of...
http://issues.apache.org/jira/browse/HDFS-1056    Author: Todd Lipcon, 2014-07-30, 17:42
[HDFS-788] Datanode behaves badly when one disk is very low on space - HDFS - [issue]
...FSDataset.getNextVolume() uses FSVolume.getAvailable() to determine whether to allocate a block on a volume. This doesn't factor in other in-flight blocks that have been "promised" space on ...
http://issues.apache.org/jira/browse/HDFS-788    Author: Todd Lipcon, 2014-07-30, 01:00
[HDFS-864] Potential deadlock rolling edit logs - HDFS - [issue]
...FSEditLog.rollEditLog locks the log, then the FSImage. FSImage.close locks the image, then the log....
http://issues.apache.org/jira/browse/HDFS-864    Author: Todd Lipcon, 2014-07-29, 22:41
[HDFS-862] Potential NN deadlock in processDistributedUpgradeCommand - HDFS - [issue]
...Haven't seen this in practice, but the lock order is inconsistent. processReport locks FSNamesystem, then calls UpgradeManager.startUpgrade, getUpgradeState, and getUpgradeStatus (each of wh...
http://issues.apache.org/jira/browse/HDFS-862    Author: Todd Lipcon, 2014-07-29, 22:41
[HDFS-842] Serialize NN edits log as avro records - HDFS - [issue]
...Right now, the edits log is a mishmash of ad-hoc serialization and Writables. Switching it over to Avro records would be really useful for operator tools - an "offline edits viewer" would be...
http://issues.apache.org/jira/browse/HDFS-842    Author: Todd Lipcon, 2014-07-29, 22:17
[HDFS-460] Expose NN and DN hooks to service plugins - HDFS - [issue]
...This is the other half of the old HADOOP-5640 (Allow ServicePlugins to hook callbacks into key service events). It adds hooks to the NN and DN to expose certain events to plugins....
http://issues.apache.org/jira/browse/HDFS-460    Author: Todd Lipcon, 2014-07-23, 19:39
[HDFS-4324] Track and report out-of-date blocks separately from corrupt blocks - HDFS - [issue]
...Currently in various places (metrics, dfsadmin -report, fsck, logs) we use the term "corrupt" to refer to blocks which have an out-of-date generation stamp. Since out-of-date blocks are a fa...
http://issues.apache.org/jira/browse/HDFS-4324    Author: Todd Lipcon, 2014-07-10, 17:18
[HDFS-2882] DN continues to start up, even if block pool fails to initialize - HDFS - [issue]
...I started a DN on a machine that was completely out of space on one of its drives. I saw the following:2012-02-02 09:56:50,499 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initiali...
http://issues.apache.org/jira/browse/HDFS-2882    Author: Todd Lipcon, 2014-06-30, 09:18
[HDFS-3103] HA NN should be able to handle some cases of storage dir recovery on start - HDFS - [issue]
...As a shortcut in developing HA, we elected not to deal with the case of storage directory recovery while HA is enabled. But there are many cases where we can and should handle it. For exampl...
http://issues.apache.org/jira/browse/HDFS-3103    Author: Todd Lipcon, 2014-04-23, 21:25
[HDFS-3969] Small bug fixes and improvements for disk locations API - HDFS - [issue]
...The new disk block locations API has a configurable timeout, but it's used inconsistently: the invokeAll() call to the thread pool assumes the timeout is in seconds, but the RPC timeout is s...
http://issues.apache.org/jira/browse/HDFS-3969    Author: Todd Lipcon, 2014-04-10, 14:12
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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