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[HDFS-153] NameNode entered into an infinite loop of logging - HDFS - [issue]
...We have a cluster running Hadoop 0.19.0.For some reason, the name node entered into an infinite loop of spitting the following message once every second:2009-03-30 00:00:02,658 INFO org.apac...
http://issues.apache.org/jira/browse/HDFS-153    Author: Runping Qi, 2014-07-21, 23:16
[HDFS-179] hadoop fs -test -d should return different codes for difference cases - HDFS - [issue]
...Currently, hadoop fs -test -d path  returns 0 for the case where path is a directory and -1 for all the other cases such as execution errors, path does not exists, and path is a file.It...
http://issues.apache.org/jira/browse/HDFS-179    Author: Runping Qi, 2014-07-21, 22:22
[HDFS-97] DFS should detect slow links(nodes) and avoid them - HDFS - [issue]
...The current DFS does not detect slow links (nodes).Thus, when a node or its network link is slow, it may affect the overall system performance significantly.Specifically, when a map job need...
http://issues.apache.org/jira/browse/HDFS-97    Author: Runping Qi, 2014-07-21, 21:03
[HDFS-332] hadoop fs -put should return different code for different failures - HDFS - [issue]
...hadoop fs -put may fail due to different reasons, such as the source file does not exist, the destination file already exists, permission denied, or exceptions during writing.However, it ret...
http://issues.apache.org/jira/browse/HDFS-332    Author: Runping Qi, 2014-07-21, 21:00
[HDFS-338] When a block is severely under replicated at creation time, a request for block replication should be scheduled immediately - HDFS - [issue]
...During writing a block to data nodes, if the dfs client detects a bad data node in the write pipeline, it will re-construct a new data pipeline, excluding the detected bad data node. This im...
http://issues.apache.org/jira/browse/HDFS-338    Author: Runping Qi, 2014-07-17, 23:09
[HDFS-354] Data node process consumes 180% cpu - HDFS - [issue]
...I did a test on DFS read throughput and found that the data node process consumes up to 180% cpu when it is under heavi load. Here are the details:The cluster has 380+ machines, each with 3G...
http://issues.apache.org/jira/browse/HDFS-354    Author: Runping Qi, 2014-07-17, 19:19
[HDFS-198] org.apache.hadoop.dfs.LeaseExpiredException during dfs write - HDFS - [issue]
...Many long running cpu intensive map tasks failed due to org.apache.hadoop.dfs.LeaseExpiredException.See a comment below for the exceptions from the log:...
http://issues.apache.org/jira/browse/HDFS-198    Author: Runping Qi, 2014-01-21, 02:28
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