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[HDFS-11661] GetContentSummary uses excessive amounts of memory
...ContentSummaryComputationContext::nodeIncluded() is being used to keep track of all INodes visited during the current content summary calculation. This can be all of the INodes in the filesy...
, 2017-06-07, 23:56
[HDFS-11755] Underconstruction blocks can be considered missing
...Following sequence of events can lead to a block underconstruction being considered missing. pipeline of 3 DNs, DN1->DN2->DN3 DN3 has a failing disk so some updates take a long time Cl...
, 2017-05-12, 16:21
[HDFS-8873] Allow the directoryScanner to be rate-limited
...The new 2-level directory layout can make directory scans expensive in terms of disk seeks (see HDFS-8791) for details. It would be good if the directoryScanner() had a configurable duty cyc...
, 2017-04-27, 22:06
[HDFS-7645] Rolling upgrade is restoring blocks from trash multiple times
...When performing an HDFS rolling upgrade, the trash directory is getting restored twice when under normal circumstances it shouldn't need to be restored at all. iiuc, the only time these bloc...
, 2016-12-01, 23:26
[HDFS-8791] block ID-based DN storage layout can be very slow for datanode on ext4
...We are seeing cases where the new directory layout causes the datanode to basically cause the disks to seek for 10s of minutes. This can be when the datanode is running du, and it can also b...
, 2016-04-07, 00:09
[HDFS-8894] Set SO_KEEPALIVE on DN server sockets
...SO_KEEPALIVE is not set on things like datastreamer sockets which can cause lingering ESTABLISHED sockets when there is a network glitch....
, 2015-12-16, 02:24
[HDFS-6407] Add sorting and pagination in the datanode tab of the NN Web UI
...old ui supported clicking on column header to sort on that column. The new ui seems to have dropped this very useful feature.There are a few tables in the Namenode UI to display datano...
, 2015-10-03, 23:29
[HDFS-8404] Pending block replication can get stuck using older genstamp
...If an under-replicated block gets into the pending-replication list, but later the genstamp of that block ends up being newer than the one originally submitted for replication, the blo...
, 2015-07-31, 23:55
[HDFS-7742] favoring decommissioning node for replication can cause a block to stay underreplicated for long periods
...When choosing a source node to replicate a block from, a decommissioning node is favored. The reason for the favoritism is that decommissioning nodes aren't servicing any writes so in-theory...
, 2015-07-22, 23:59
[HDFS-5535] Umbrella jira for improved HDFS rolling upgrades
...In order to roll a new HDFS release through a large cluster quickly and safely, a few enhancements are needed in HDFS. An initial High level design document will be attached to this jira, an...
, 2014-12-18, 19:10
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