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Date: Wed, 2 Jan 2013 15:26:13 +0000 (UTC)
From: "Jonathan Ellis (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12625687.1357139079715.69648.1357140373154@arcas>
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Subject: [jira] [Commented] (CASSANDRA-5097) cassandra-shuffle fails as
 system keyspace is not user-modifiable
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    [ https://issues.apache.org/jira/browse/CASSANDRA-5097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13542177#comment-13542177 ] 

Jonathan Ellis commented on CASSANDRA-5097:
-------------------------------------------

We should allow modifying system table contents, but not changing the schema.
                
> cassandra-shuffle fails as system keyspace is not user-modifiable
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-5097
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-5097
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core, Tools
>    Affects Versions: 1.2.0 rc2, 1.2.0
>            Reporter: Jouni Hartikainen
>            Assignee: Aleksey Yeschenko
>             Fix For: 1.2.1
>
>
> cassandra-shuffle tool fails to insert calculated relocations into the system keyspace as it is not user-modifiable. When run, the following exception is thrown after printing out the list of relocations for the first node in ring:
> Exception in thread "main" java.lang.RuntimeException: InvalidRequestException(why:system keyspace is not user-modifiable.)
>         at org.apache.cassandra.tools.Shuffle.executeCqlQuery(Shuffle.java:516)
>         at org.apache.cassandra.tools.Shuffle.shuffle(Shuffle.java:359)
>         at org.apache.cassandra.tools.Shuffle.main(Shuffle.java:678)
> Caused by: InvalidRequestException(why:system keyspace is not user-modifiable.)
>         at org.apache.cassandra.thrift.Cassandra$execute_cql3_query_result.read(Cassandra.java:37849)
>         at org.apache.thrift.TServiceClient.receiveBase(TServiceClient.java:78)
>         at org.apache.cassandra.thrift.Cassandra$Client.recv_execute_cql3_query(Cassandra.java:1562)
>         at org.apache.cassandra.thrift.Cassandra$Client.execute_cql3_query(Cassandra.java:1547)
>         at org.apache.cassandra.tools.CassandraClient.execute_cql_query(Shuffle.java:733)
>         at org.apache.cassandra.tools.Shuffle.executeCqlQuery(Shuffle.java:502)
>         ... 2 more
> By quickly checking the code it seems that the patch set for CASSANDRA-4874 disallows modifications to system keyspace again (they were previously allowed by CASSANDRA-4664) thus rendering cassandra-shuffle unable to do its job.

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