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[HDFS-3368] Missing blocks due to bad DataNodes coming up and down. - HDFS - [issue]
...All replicas of a block can be removed if bad DataNodes come up and down during cluster restart resulting in data loss....
http://issues.apache.org/jira/browse/HDFS-3368    Author: Konstantin Shvachko, 2012-07-19, 22:13
Re: Changing where HDFS stores its data - HDFS - [mail # user]
...In hdfs-site.xml you should specify dfs.namenode.name.dir for NameNode stoareg directories or / and dfs.datanode.data.dir for DataNode storage  Changing temporary directory location cha...
   Author: Konstantin Shvachko, 2012-06-19, 00:12
[HDFS-1107] Turn on append by default. - HDFS - [issue]
...hdfs-default.xml still has the old default value dfs.support.append = false. It should be changed to true, or removed from the default configuration and treated as true if not found....
http://issues.apache.org/jira/browse/HDFS-1107    Author: Konstantin Shvachko, 2012-06-17, 12:13
[HDFS-2290] Block with corrupt replica is not getting replicated - HDFS - [issue]
...A block has one replica marked as corrupt and two good ones. countNodes() correctly detects that there are only 2 live replicas, and fsck reports the block as under-replicated. But Replicati...
http://issues.apache.org/jira/browse/HDFS-2290    Author: Konstantin Shvachko, 2012-06-04, 17:30
[HDFS-3462] TestDFSClientRetries.busyTest() should restore default xceiver count in the config. - HDFS - [issue]
...TestDFSClientRetries.busyTest() sets maximum xceiver count in the config to a small value, but does not restore it back to the default. As the result subsequent tests can fail, especially on...
http://issues.apache.org/jira/browse/HDFS-3462    Author: Konstantin Shvachko, 2012-05-31, 14:06
[HDFS-3463] DFSTestUtil.waitCorruptReplicas() should not use file reading time as a timeout measure. - HDFS - [issue]
...Tests fail because DFSTestUtil.waitCorruptReplicas() does not wait long enough....
http://issues.apache.org/jira/browse/HDFS-3463    Author: Konstantin Shvachko, 2012-05-30, 19:27
[HDFS-535] TestFileCreation occasionally fails because of an exception in DataStreamer. - HDFS - [issue]
...One of test cases, namely testFsCloseAfterClusterShutdown(), of TestFileCreation fails occasionally....
http://issues.apache.org/jira/browse/HDFS-535    Author: Konstantin Shvachko, 2012-05-21, 18:26
[HDFS-119] logSync() may block NameNode forever. - HDFS - [issue]
...FSEditLog.logSync() first waits until isSyncRunning is false and then performs syncing to file streams by calling EditLogOutputStream.flush().If an exception is thrown after isSyncRunning is...
http://issues.apache.org/jira/browse/HDFS-119    Author: Konstantin Shvachko, 2012-04-24, 21:54
[expand - 1 more] - Re: [DISCUSS] Remove append? - HDFS - [mail # dev]
...Eli,  I went over the entire discussion on the topic, and did not get it. Is there a problem with append? We know it does not work in hadoop-1, only flush() does. Is there anything wron...
   Author: Konstantin Shvachko, 2012-03-22, 08:26
[HDFS-107] Data-nodes should be formatted when the name-node is formatted. - HDFS - [issue]
...The upgrade feature HADOOP-702 requires data-nodes to store persistently the namespaceID in their version files and verify during startup that it matches the one stored on the name-node.When...
http://issues.apache.org/jira/browse/HDFS-107    Author: Konstantin Shvachko, 2012-03-10, 18:43
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