[
https://issues.apache.org/jira/browse/CASSANDRA-10801?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Maor Cohen updated CASSANDRA-10801:
-----------------------------------
Attachment: trace2.log
Another example:
Rows that was loaded on Dec 17 (4 days before the read attempt). Executed CQL
with consistency level ONE:
1. First query returned no rows. Logs shows that it doesn't send read request
to other nodes.
2. Second query also didn't return rows. Read request sent to other nodes.
Inconsistency found by read repair.
3. Last query returned the row.
I don't understand why the first query didn't send request to other nodes while
the last one did. Can someone explain this?
> Unexplained inconsistent data with Cassandra 2.1
> ------------------------------------------------
>
> Key: CASSANDRA-10801
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10801
> Project: Cassandra
> Issue Type: Bug
> Reporter: Imri Zvik
> Fix For: 2.1.x
>
> Attachments: trace2.log, tracing.log
>
>
> We are experiencing weird behavior which we cannot explain.
> We have a CF, with RF=3, and we are writing and reading data to it with
> consistency level of ONE.
> For some reason, we see inconsistent results when querying for data.
> Even for rows that were written a day ago, we're seeing inconsistent results
> (1 replca has the data, the two others don't).
> Now, I would expect to see timeouts/dropped mutations, but all relevant
> counters are not advancing, and I would also expect hints to fix this
> inconsistency within minutes, but yet it doesn't.
> {code}
> cqlsh:testing> SELECT WRITETIME(last_update),site_id, tree_id, individual_id,
> last_update FROM testcf WHERE site_id = 229673621 AND tree_id = 9 AND
> individual_id = 9032483;
> writetime(last_update) | site_id | tree_id | individual_id | last_update
> ------------------------+-----------+---------+---------------+-------------
> 1448988343028000 | 229673621 | 9 | 9032483 | 1380912397
> (1 rows)
> cqlsh:testing> SELECT WRITETIME(last_update),site_id, tree_id, individual_id,
> last_update FROM testcf WHERE site_id = 229673621 AND tree_id = 9 AND
> individual_id = 9032483;
> site_id | tree_id | individual_id | last_update
> -----------+---------+---------------+-------------
> (0 rows)
> cqlsh:testing> SELECT dateof(now()) FROM system.local ;
> dateof(now())
> --------------------------
> 2015-12-02 14:48:44+0000
> (1 rows)
> {code}
> We are running with Cassandra 2.1.11 with Oracle Java 1.8.0_65-b17
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
