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[HDFS-9802] Selectively save blocks to trash dir during rolling upgrades - HDFS - [issue]
...Currently datanodes save any invalidated blocks to the trash directory during a rolling upgrade. Compared to the "previous" directory for full upgrade, the trash can grow quickly. This is es...
http://issues.apache.org/jira/browse/HDFS-9802    Author: Kihwal Lee, 2016-02-12, 20:51
[HDFS-9533] seen_txid in the shared edits directory is modified during bootstrapping - HDFS - [issue]
...The last known transaction id is stored in the seen_txid file of all known directories of a NNStorage when starting a new edit segment. However, we have seen a case where it contains an id t...
http://issues.apache.org/jira/browse/HDFS-9533    Author: Kihwal Lee, 2016-02-12, 16:47
[HDFS-9395] Make HDFS audit logging consistant - HDFS - [issue]
...So, the big question here is what should go in the audit log? All failures, or just "permission denied" failures? Or, to put it a different way, if someone attempts to do something and it fa...
http://issues.apache.org/jira/browse/HDFS-9395    Author: Kihwal Lee, 2016-02-11, 14:57
[HDFS-9752] Permanent write failures may happen to slow writers during datanode rolling upgrades - HDFS - [issue]
...When datanodes are being upgraded, an out-of-band ack is sent upstream and the client does a pipeline recovery. The client may hit this multiple times as more nodes get upgraded.  This ...
http://issues.apache.org/jira/browse/HDFS-9752    Author: Kihwal Lee, 2016-02-11, 14:01
[HDFS-9730] Storage ID update does not happen when there is a layout change - HDFS - [issue]
...HDFS-9654 will cause test failures when we increment the datanode layout version next time.TestDatanodeStartupFixesLegacyStorageIDs#testUpgradeFrom22via26FixesStorageIDsTestDatanodeStartupFi...
http://issues.apache.org/jira/browse/HDFS-9730    Author: Kihwal Lee, 2016-02-05, 06:11
[HDFS-9743] Fix TestLazyPersistFiles#testFallbackToDiskFull in branch-2.7 - HDFS - [issue]
...The corresponding test case has been moved and fixed in trunk by HDFS-9073 and HDFS-9067. We should fix it in branch-2.7 too, but it will need a different patch....
http://issues.apache.org/jira/browse/HDFS-9743    Author: Kihwal Lee, 2016-02-03, 18:54
[HDFS-9740] Use a reasonable limit in DFSTestUtil.waitForMetric() - HDFS - [issue]
...If test is detecting a bug, it will probably hit the long surefire timeout because the max is Integer.MAX_VALUE.  Use something more realistic. The default jmx update interval is 10 sec...
http://issues.apache.org/jira/browse/HDFS-9740    Author: Kihwal Lee, 2016-02-03, 06:25
[HDFS-9739] DatanodeStorage.isValidStorageId() is broken - HDFS - [issue]
...After HDFS-8979, the check is returning true for the old storage ID format. So storage IDs in the old format  won't be updated during datanode upgrade....
http://issues.apache.org/jira/browse/HDFS-9739    Author: Kihwal Lee, 2016-02-03, 05:16
[HDFS-4186] logSync() is called with the write lock held while releasing lease - HDFS - [issue]
...As pointed out in HDFS-4183, when the lease monitor calls internalReleaseLease(), it acquires the namespace write lock. Inside internalReleaseLease(), if a block recovery is needed, the leas...
http://issues.apache.org/jira/browse/HDFS-4186    Author: Kihwal Lee, 2016-02-03, 03:27
[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, 2016-02-03, 00:37
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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