[
https://issues.apache.org/jira/browse/HADOOP-11938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14533953#comment-14533953
]
Kai Zheng commented on HADOOP-11938:
------------------------------------
This will also resolve the following test case failure. It is exposed by latest
change in erasure coder.
{noformat}
2015-05-08 18:50:06,607 WARN datanode.DataNode
(ErasureCodingWorker.java:run(386)) - Transfer failed for all targets.
2015-05-08 18:50:06,608 WARN datanode.DataNode
(ErasureCodingWorker.java:run(399)) - Failed to recover striped block:
BP-1597876081-10.239.12.51-1431082199073:blk_-9223372036854775792_1001
2015-05-08 18:50:06,609 INFO datanode.DataNode
(BlockReceiver.java:receiveBlock(826)) - Exception for
BP-1597876081-10.239.12.51-1431082199073:blk_-9223372036854775784_1001
java.io.IOException: Premature EOF from inputStream
at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:203)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doReadFully(PacketReceiver.java:213)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:134)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:109)
at
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:472)
at
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:787)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:803)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:137)
at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:74)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:250)
at java.lang.Thread.run(Thread.java:745)
{noformat}
> Fix ByteBuffer version encode/decode API of raw erasure coder
> -------------------------------------------------------------
>
> Key: HADOOP-11938
> URL: https://issues.apache.org/jira/browse/HADOOP-11938
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io
> Reporter: Kai Zheng
> Assignee: Kai Zheng
>
> While investigating a test failure in {{TestRecoverStripedFile}}, one issue
> in raw erasrue coder, a bad optimization in below codes. It assumes the heap
> buffer backed by the bytes array available for reading or writing always
> starts with zero and takes the whole.
> {code}
> protected static byte[][] toArrays(ByteBuffer[] buffers) {
> byte[][] bytesArr = new byte[buffers.length][];
> ByteBuffer buffer;
> for (int i = 0; i < buffers.length; i++) {
> buffer = buffers[i];
> if (buffer == null) {
> bytesArr[i] = null;
> continue;
> }
> if (buffer.hasArray()) {
> bytesArr[i] = buffer.array();
> } else {
> throw new IllegalArgumentException("Invalid ByteBuffer passed, " +
> "expecting heap buffer");
> }
> }
> return bytesArr;
> }
> {code}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
