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[HDFS-8863] The remaining space check in BlockPlacementPolicyDefault is flawed
...The block placement policy calls DatanodeDescriptor#getRemaining(StorageType}} to check whether the block is going to fit. Since the method is adding up all remaining spaces, namenode can al...
, 2015-09-09, 07:23
[HDFS-7587] Edit log corruption can happen if append fails with a quota violation
...We have seen a standby namenode crashing due to edit log corruption. It was complaining that OP_CLOSE cannot be applied because the file is not under-construction.When a client was trying to...
, 2015-09-02, 00:54
[HDFS-7788] Post-2.6 namenode may not start up with an image containing inodes created with an old release.
...Before HDFS-4305, which was fixed in 2.1.0-beta, clients could specify arbitrarily small preferred block size for a file including 0. This was normally done by faulty clients or failed creat...
, 2015-09-01, 02:36
[HDFS-8864] Padding is needed in remaining space check
...The RBW reservation feature removed the padding of 5 block worth of space in the remaining space check. But when disks are close to being full, a small accounting errors can make block...
, 2015-08-06, 18:53
[HDFS-7894] Rolling upgrade readiness is not updated in jmx until query command is issued.
...When a hdfs rolling upgrade is started and a rollback image is created/uploaded, the active NN does not update its rollingUpgradeInfo until it receives a query command via RPC. This results ...
, 2015-08-03, 21:08
[HDFS-5498] Improve datanode startup time
...Similarly to HDFS-5027, an improvement can be made for getVomeMap(). This is the phase in which ReplicaMap.is populated. But it will be even better if datanode scans only once an...
, 2015-07-02, 10:16
[HDFS-8068] Do not retry rpc calls If the proxy contains unresolved address
...When the InetSocketAddress object happens to be unresolvable (e.g. due to transient DNS issue), the rpc proxy object will not be usable since the client will throw UnknownHostException when ...
, 2015-06-26, 23:07
[HDFS-6663] Admin command to track file and locations from block id
...A dfsadmin command that allows finding out the file and the locations given a block number will be very useful in debugging production issues. It may be possible to add this feature t...
, 2015-06-16, 18:17
[HDFS-8547] The space reservation for RBW block is leaking
...HDFS-6898 added the feature to reserve space on datanode when creating RBW replicas. We have noticed that nonDfsUsed increasing on some of the datanodes. Heap dump of datanodes has rev...
, 2015-06-15, 16:41
[HDFS-5138] Support HDFS upgrade in HA
...With HA enabled, NN wo't start with "-upgrade". Since there has been a layout version change between 2.0.x and 2.1.x, starting NN in upgrade mode was necessary when deploying 2.1.x to an exi...
, 2015-05-22, 20:01
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