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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2013/06/19 23:50:20 UTC
[jira] [Resolved] (CASSANDRA-5568) Invalid tracing info for
execute_prepared_cql3_query
[ https://issues.apache.org/jira/browse/CASSANDRA-5568?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jonathan Ellis resolved CASSANDRA-5568.
---------------------------------------
Resolution: Not A Problem
Fix Version/s: (was: 1.2.7)
Going to notaproblem this then. Tracing is relatively heavyweight and a great way to overload the system if you trace *everything*. (Hence, the support for tracing a random fraction.)
> Invalid tracing info for execute_prepared_cql3_query
> ----------------------------------------------------
>
> Key: CASSANDRA-5568
> URL: https://issues.apache.org/jira/browse/CASSANDRA-5568
> Project: Cassandra
> Issue Type: Bug
> Components: Core
> Affects Versions: 1.2.0
> Environment: Windows 8 x64
> Java HotSpot(TM) 64-Bit Server VM/1.7.0_11
> Reporter: Pierre Chalamet
> Assignee: Ryan McGuire
> Priority: Minor
> Attachments: 5568-logs.tar.gz, 5568_test.py
>
>
> When using trace_next_query() then execute_prepared_cql3_query(), it looks like tracing info are invalid (number of sessions/events and columns values are wrong).
> How to reproduce:
> {code}
> create keyspace Tests with replication = {'class': 'SimpleStrategy', 'replication_factor' : 1}
> create table Tests.stresstest (strid varchar,intid int, primary key (strid))
> {code}
> and then executing the following prepared query 50,000 times:
> {code}
> insert into Tests.stresstest (intid, strid) values (?, ?)
> {code}
> produces the following results:
> {code}
> localhost> select count(*) from Tests.stresstest
> +------------+
> | count |
> +============+
> | 50000 |
> +------------+
> localhost> select count(*) from system_traces.events
> +------------+
> | count |
> +============+
> | 20832 |
> +------------+
> localhost> select count(*) from system_traces.sessions
> +------------+
> | count |
> +============+
> | 26717 |
> +------------+
> localhost> select * from system_traces.sessions limit 10
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | sessionid | coordinator | duration | parameters | request | startedat |
> +==========================================+=================+==============+================+=================================+===========================+
> | 9aefc263-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:55 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9ce0bcf7-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:59 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9dbe4ba4-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:17:00 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9d4d3a54-bcdb-11e2-8c60-fb495ee6a12c | | 44 | | | |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9a790bc1-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:55 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9c992c98-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:58 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9e27e2f6-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 53 | | execute_prepared_cql3_query | 5/14/2013 9:17:01 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9b172074-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:56 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9a7cdc53-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 53 | | execute_prepared_cql3_query | 5/14/2013 9:16:55 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 9b6eb654-bcdb-11e2-8c60-fb495ee6a12c | 127.0.0.1 | | | execute_prepared_cql3_query | 5/14/2013 9:16:56 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> {code}
> Using binary protocol and enabling tracing produces expected results:
> {code}
> localhost> select count(*) from Tests.stresstest
> +------------+
> | count |
> +============+
> | 50000 |
> +------------+
> localhost> select count(*) from system_traces.events
> +-------------+
> | count |
> +=============+
> | 200002 |
> +-------------+
> localhost> select count(*) from system_traces.sessions
> +------------+
> | count |
> +============+
> | 50001 |
> +------------+
> localhost> select * from system_traces.sessions limit 10
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | sessionid | coordinator | duration | parameters | request | startedat |
> +==========================================+=================+==============+================+=================================+===========================+
> | 745f5d10-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 141 | | Execute CQL3 prepared query | 5/14/2013 9:23:00 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 7ad9b050-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 131 | | Execute CQL3 prepared query | 5/14/2013 9:23:11 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 7ba00d90-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 123 | | Execute CQL3 prepared query | 5/14/2013 9:23:12 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 6ba0e635-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 60 | | Execute CQL3 prepared query | 5/14/2013 9:22:45 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 7f4595f0-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 254 | | Execute CQL3 prepared query | 5/14/2013 9:23:18 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 88c82020-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 1138 | | Execute CQL3 prepared query | 5/14/2013 9:23:34 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 83c6ff60-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 142 | | Execute CQL3 prepared query | 5/14/2013 9:23:26 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 824e1b05-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 75 | | Execute CQL3 prepared query | 5/14/2013 9:23:23 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 73957d60-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 147 | | Execute CQL3 prepared query | 5/14/2013 9:22:59 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> | 79f25d90-bcdc-11e2-8c60-fb495ee6a12c | 127.0.0.1 | 153 | | Execute CQL3 prepared query | 5/14/2013 9:23:09 PM |
> +------------------------------------------+-----------------+--------------+----------------+---------------------------------+---------------------------+
> {code}
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