[
https://issues.apache.org/jira/browse/CASSANDRA-10347?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14876665#comment-14876665
]
Paulo Motta commented on CASSANDRA-10347:
-----------------------------------------
Unfortunately it's not trivial to tolerate node failures transparently, as this
would require submitting hints or expecting clients to perform anti-entropy
(repairs) after the node is back. In order to allow the client to ignore down
nodes, I added option {{mapreduce.output.bulkoutputformat.ignorehosts}} to
allow blacklisting down nodes, so they would know in advance it needs to run
repair after the down node is back. Also added helper methods to
{{CqlBulkOutputFormat}}: {{setIgnoreHosts}} and {{getIgnoreHosts}}.
Attaching 2.1 and 2.2+ patches. Tests will be available below:
* [2.1
dtests|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-2.1-10347-dtest/]
* [2.1
testall|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-2.1-10347-testall/]
* [2.2
dtests|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-2.2-10347-dtest/]
* [2.2
testall|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-2.2-10347-testall/]
* [3.0
dtests|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-3.0-10347-dtest/]
* [3.0
testall|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-3.0-10347-testall/]
* [trunk
dtests|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-trunk-10347-dtest/]
* [trunk
testall|http://cassci.datastax.com/view/Dev/view/paulomotta/job/pauloricardomg-trunk-10347-testall/]
> Bulk Loader API could not tolerate even node failure
> ----------------------------------------------------
>
> Key: CASSANDRA-10347
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10347
> Project: Cassandra
> Issue Type: Bug
> Reporter: Shenghua Wan
> Assignee: Paulo Motta
>
> When user uses CqlBulkOutputFormat, it tries to stream to all the nodes in
> the token range, which includes the dead nodes. Therefore, the stream failed.
> There was a design in C* API to allow stream() method to have a list of
> ignore hosts, but it was not utilized.
> The empty-argument stream() method is called in all existing versions of C*,
> i.e.
> in v2.0.11,
> https://github.com/apache/cassandra/blob/cassandra-2.0.11/src/java/org/apache/cassandra/hadoop/AbstractBulkRecordWriter.java#L122
> in v2.1.5,
> https://github.com/apache/cassandra/blob/cassandra-2.1.5/src/java/org/apache/cassandra/hadoop/AbstractBulkRecordWriter.java#L122
> and current trunk branch
> https://github.com/apache/cassandra/blob/trunk/src/java/org/apache/cassandra/hadoop/cql3/CqlBulkRecordWriter.java#L241
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
