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Date: Thu, 4 Jun 2015 17:22:40 +0000 (UTC)
From: "Aleksey Yeschenko (JIRA)" <jira@apache.org>
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Subject: [jira] [Updated] (CASSANDRA-9272) Atomic Batch Statements Fail to
 Execute on Some Coordinators
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     [ https://issues.apache.org/jira/browse/CASSANDRA-9272?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aleksey Yeschenko updated CASSANDRA-9272:
-----------------------------------------
    Fix Version/s:     (was: 2.0.x)

> Atomic Batch Statements Fail to Execute on Some Coordinators
> ------------------------------------------------------------
>
>                 Key: CASSANDRA-9272
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9272
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>         Environment: Operating System: Red Hat Enterprise Linux Server release 6.5 (Santiago) |
> Cassandra and CQL: [cqlsh 4.1.1 | Cassandra 2.0.14 | CQL spec 3.1.1 | Thrift protocol 19.39.0] |
> JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.7.0_79 (Oracle Java) |
> Using PropertyFileSnitch to define cluster topology.
>            Reporter: Jared Gray
>            Assignee: Carl Yeksigian
>
> Install and configure a three-node Cassandra cluster spread across two data centers (DCs). Place two Cassandra instances in DC1 and one Cassandra instance in DC2. (We have designated one node as a seed in each data center.)
> Gracefully shut down any one Cassandra instance in DC1. This can be done by running 'kill <process_id>' in Linux.
> Open a CQL Shell connection to the remaining node in DC1.
> Create the following keyspace: {{CREATE KEYSPACE batch_test WITH replication = \{'class': 'NetworkTopologyStrategy', 'DC1': '2', 'DC2':'1'\};}}
> Create the following table: {{CREATE TABLE batch_test.batch_table ( partition_key TEXT PRIMARY KEY );}}
> Execute the following atomic batch query: {{BEGIN BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH}};
> Observe an availability-related error, despite a sufficient number of nodes available to service the query. The trace below shows sample results from our cluster:
> DC1
> ----
> {noformat}
> cqlsh> CONSISTENCY
> Current consistency level is ONE.
> cqlsh> BEGIN BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> Unable to complete request: one or more nodes were unavailable.
> cqlsh> CONSISTENCY QUORUM
> Consistency level set to QUORUM.
> cqlsh> BEGIN BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> Unable to complete request: one or more nodes were unavailable.
> cqlsh> BEGIN UNLOGGED BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> cqlsh>
> {noformat}
> Note: an UNLOGGED BATCH executes successfully. A regular BATCH also executes successfully if it only contains one INSERT query.
> We now show a similar trace using a CQL Shell connected to the Cassandra instance in DC2:
> DC2
> ---
> {noformat}
> cqlsh> CONSISTENCY
> Current consistency level is ONE.
> cqlsh> BEGIN BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> cqlsh> CONSISTENCY QUORUM
> Consistency level set to QUORUM.
> cqlsh> BEGIN BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> cqlsh> BEGIN UNLOGGED BATCH INSERT INTO batch_test.batch_table (partition_key) VALUES ('a'); INSERT INTO batch_test.batch_table (partition_key) VALUES ('b'); APPLY BATCH;
> cqlsh>
> {noformat}
> All queries execute successfully using the DC2 Cassandra instance as a coordinator.


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