dragon created HDFS-10115:
-----------------------------
Summary: CLONE - Fix a decoding issue in stripped block recovering
in client side
Key: HDFS-10115
URL: https://issues.apache.org/jira/browse/HDFS-10115
Project: Hadoop HDFS
Issue Type: Sub-task
Reporter: dragon
Assignee: Kai Zheng
Fix For: HDFS-7285
[~jingzhao] reported a decoding issue in HDFS-8481 in the comment copied below:
bq. While debugging HDFS-8319, I just found that in
TestWriteReadStripedFile#testWritePreadWithDNFailure, if we change the
startOffsetInFile from cellSize * 5 to 0, the test fails with the following
error msg:
{noformat}
java.lang.AssertionError: Byte at 524288 should be the same expected:<27> but
was:<-9>
at org.junit.Assert.fail(Assert.java:88)
at org.junit.Assert.failNotEquals(Assert.java:743)
at org.junit.Assert.assertEquals(Assert.java:118)
at org.junit.Assert.assertEquals(Assert.java:555)
at
org.apache.hadoop.hdfs.TestWriteReadStripedFile.testWritePreadWithDNFailure(TestWriteReadStripedFile.java:390)
{noformat}
It was caused by an issue that we need to adjust the inputs order to call
decoder#decode. When startOffsetInFile is 5 * cellSize, the recovering or
decoding won't be needed as ZERO cells don't need to recover; when it's 0, the
issue then was exposed, as normal data cells must be recovered thru the
decoding.
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