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[HDFS-9146] HDFS forward seek() within a block shouldn't spawn new TCP Peer/RemoteBlockReader - HDFS - [issue]
...When a seek() + forward readFully() is triggered from a remote dfsclient, HDFS opens a new remote block reader even if the seek is within the same HDFS block.(analysis from Rajesh Balamohan)...
http://issues.apache.org/jira/browse/HDFS-9146    Author: Gopal V, 2015-12-13, 22:01
[HDFS-8070] Pre-HDFS-7915 DFSClient cannot use short circuit on post-HDFS-7915 DataNode - HDFS - [issue]
...HDFS ShortCircuitShm layer keeps the task locked up during multi-threaded split-generation.I hit this immediately after I upgraded the data, so I wonder if the ShortCircuitShim wire protocol...
http://issues.apache.org/jira/browse/HDFS-8070    Author: Gopal V, 2015-09-02, 22:45
[HDFS-8278] HDFS Balancer should consider remaining storage % when checking for under-utilized machines - HDFS - [issue]
...DFS balancer mistakenly identifies a node with very little storage space remaining as an "underutilized" node and tries to move large amounts of data to that particular node.All these block ...
http://issues.apache.org/jira/browse/HDFS-8278    Author: Gopal V, 2015-08-18, 18:35
[HDFS-6898] DN must reserve space for a full block when an RBW block is created - HDFS - [issue]
...DN will successfully create two RBW blocks on the same volume even if the free space is sufficient for just one full block.One or both block writers may subsequently get a DiskOutOfSpace exc...
http://issues.apache.org/jira/browse/HDFS-6898    Author: Gopal V, 2015-06-18, 19:21
[HDFS-6836] HDFS INFO logging is verbose & uses file appenders - HDFS - [issue]
...Reported by:  Gopal V.The HDFS INFO logs is present within the inner loops of HDFS logging information like2014-07-24 19:43:34,459 INFO  DataNode.clienttrace (BlockSender.java:send...
http://issues.apache.org/jira/browse/HDFS-6836    Author: Gopal V, 2015-05-04, 18:50
[HDFS-7297] [JDK8] azurenative test cases fail builds - HDFS - [issue]
...java.util.Base64 conflicts with com.microsoft.windowsazure.storage.core.Base64 in Azure unit tests....
http://issues.apache.org/jira/browse/HDFS-7297    Author: Gopal V, 2014-10-28, 02:21
[HDFS-7266] HDFS Peercache enabled check should not lock on object - HDFS - [issue]
...HDFS fs.Open synchronizes on the Peercache, even when peer cache is disabled. public synchronized Peer get(DatanodeID dnId, boolean isDomain) {    if (capacity <= 0) { // d...
http://issues.apache.org/jira/browse/HDFS-7266    Author: Gopal V, 2014-10-21, 16:11
[HDFS-6912] SharedFileDescriptorFactory should not allocate sparse files - HDFS - [issue]
...SharedFileDescriptor factory should not allocate sparse files.  Sparse files can lead to a SIGBUS later in the short-circuit reader when we try to read from the sparse file and memory i...
http://issues.apache.org/jira/browse/HDFS-6912    Author: Gopal V, 2014-08-27, 00:39
[HDFS-6935] RawLocalFileSystem::supportsSymLinks is confusing - HDFS - [issue]
......  @Override  public boolean supportsSymlinks() {    return true;  }  @SuppressWarnings("deprecation")  @Override  public void createSymlink(Path ta...
http://issues.apache.org/jira/browse/HDFS-6935    Author: Gopal V, 2014-08-26, 00:12
[HDFS-4710] SCR should honor dfs.client.read.shortcircuit.buffer.size even when checksums are off - HDFS - [issue]
...When short-circuit reads are on, HDFS client slows down when checksums are turned off.With checksums on, the query takes 45.341 seconds and with it turned off, it takes 56.345 seconds. This ...
http://issues.apache.org/jira/browse/HDFS-4710    Author: Gopal V, 2013-12-17, 20:58
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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