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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)