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Date: Fri, 25 Jul 2014 16:44:38 +0000 (UTC)
From: "Ryan McGuire (JIRA)" <jira@apache.org>
To: commits@cassandra.apache.org
Message-ID: <JIRA.12729765.1406306287865.45585.1406306678377@arcas>
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Subject: [jira] [Commented] (CASSANDRA-7623) Altering keyspace truncates
 DESCRIBE output until you reconnect.
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    [ https://issues.apache.org/jira/browse/CASSANDRA-7623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14074552#comment-14074552 ] 

Ryan McGuire commented on CASSANDRA-7623:
-----------------------------------------

2.0 is tested fine btw.

> Altering keyspace truncates DESCRIBE output until you reconnect.
> ----------------------------------------------------------------
>
>                 Key: CASSANDRA-7623
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-7623
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Ryan McGuire
>            Priority: Minor
>
> Run DESCRIBE on a keyspace:
> {code}
> cqlsh> DESCRIBE KEYSPACE system_traces ;
> CREATE KEYSPACE system_traces WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '2'}  AND durable_writes = true;
> CREATE TABLE system_traces.events (
>     session_id uuid,
>     event_id timeuuid,
>     activity text,
>     source inet,
>     source_elapsed int,
>     thread text,
>     PRIMARY KEY (session_id, event_id)
> ) WITH CLUSTERING ORDER BY (event_id ASC)
>     AND bloom_filter_fp_chance = 0.01
>     AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}'
>     AND comment = ''
>     AND compaction = {'min_threshold': '4', 'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32'}
>     AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
>     AND dclocal_read_repair_chance = 0.0
>     AND default_time_to_live = 0
>     AND gc_grace_seconds = 0
>     AND max_index_interval = 2048
>     AND memtable_flush_period_in_ms = 3600000
>     AND min_index_interval = 128
>     AND read_repair_chance = 0.0
>     AND speculative_retry = '99.0PERCENTILE';
> CREATE TABLE system_traces.sessions (
>     session_id uuid PRIMARY KEY,
>     coordinator inet,
>     duration int,
>     parameters map<text, text>,
>     request text,
>     started_at timestamp
> ) WITH bloom_filter_fp_chance = 0.01
>     AND caching = '{"keys":"ALL", "rows_per_partition":"NONE"}'
>     AND comment = 'traced sessions'
>     AND compaction = {'min_threshold': '4', 'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32'}
>     AND compression = {'sstable_compression': 'org.apache.cassandra.io.compress.LZ4Compressor'}
>     AND dclocal_read_repair_chance = 0.0
>     AND default_time_to_live = 0
>     AND gc_grace_seconds = 0
>     AND max_index_interval = 2048
>     AND memtable_flush_period_in_ms = 3600000
>     AND min_index_interval = 128
>     AND read_repair_chance = 0.0
>     AND speculative_retry = '99.0PERCENTILE';
> {code}
> Alter it and run DESCRIBE again: 
> {code}
> cqlsh> ALTER KEYSPACE system_traces WITH durable_writes = false;
> cqlsh> DESCRIBE KEYSPACE system_traces ;
> CREATE KEYSPACE system_traces WITH replication = {'class': 'SimpleStrategy', 'replication_factor': '2'}  AND durable_writes = false;
> {code}
> You can issue the DESCRIBE command multiple times and get the same output. You have to disconnect and reconnect to get the table definition output to show again.


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