[
https://issues.apache.org/jira/browse/HBASE-20604?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16685425#comment-16685425
]
Sean Busbey commented on HBASE-20604:
-------------------------------------
Also note that while we can try to isolate problems into things that Hadoop is
doing wrong (either in CryptoInputStream or the other implementation classes),
that project defines "what HDFS did in ~Hadoop 1" as canonical. This can
include things that some folks might consider incorrect implementation details,
if the project believes downstream has come to rely on it.
So to some degree we'll be stuck with defensive workarounds in our client usage
regardless.
> ProtobufLogReader#readNext can incorrectly loop to the same position in the
> stream until the the WAL is rolled
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-20604
> URL: https://issues.apache.org/jira/browse/HBASE-20604
> Project: HBase
> Issue Type: Bug
> Components: Replication, wal
> Affects Versions: 3.0.0
> Reporter: Esteban Gutierrez
> Assignee: Esteban Gutierrez
> Priority: Critical
> Fix For: 3.0.0, 1.5.0, 1.3.3, 2.2.0, 2.0.3, 1.4.9, 2.1.2, 1.2.9
>
> Attachments: HBASE-20604.002.patch, HBASE-20604.003.patch,
> HBASE-20604.004.patch, HBASE-20604.005.patch, HBASE-20604.patch
>
>
> Every time we call {{ProtobufLogReader#readNext}} we consume the input stream
> associated to the {{FSDataInputStream}} from the WAL that we are reading.
> Under certain conditions, e.g. when using the encryption at rest
> ({{CryptoInputStream}}) the stream can return partial data which can cause a
> premature EOF that cause {{inputStream.getPos()}} to return to the same
> origina position causing {{ProtobufLogReader#readNext}} to re-try over the
> reads until the WAL is rolled.
> The side effect of this issue is that {{ReplicationSource}} can get stuck
> until the WAL is rolled and causing replication delays up to an hour in some
> cases.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
