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Posted to commits@cassandra.apache.org by "Michael Semb Wever (Jira)" <ji...@apache.org> on 2019/10/19 14:51:00 UTC
[jira] [Commented] (CASSANDRA-14013) Data loss in snapshots
keyspace after service restart
[ https://issues.apache.org/jira/browse/CASSANDRA-14013?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16955186#comment-16955186 ]
Michael Semb Wever commented on CASSANDRA-14013:
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||branch||circleci||asf jenkins testall||asf jenkins dtests||
|[cassandra-3.0_14013|https://github.com/apache/cassandra/compare/trunk...vincewhite:14013-30]|[circleci|https://circleci.com/gh/vincewhite/workflows/cassandra/tree/14013-30]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/59//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/59/]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/694//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/694]|
|[cassandra-3.11_14013|https://github.com/apache/cassandra/compare/trunk...vincewhite:14013-test]|[circleci|https://circleci.com/gh/vincewhite/workflows/cassandra/tree/14013-test]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/60//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/60/]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/695//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/695]|
|[trunk_14013|https://github.com/apache/cassandra/compare/trunk...vincewhite:14013-trunk]|[circleci|https://circleci.com/gh/vincewhite/workflows/cassandra/tree/14013-trunk]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/61//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-testall/61/]|[!https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/696//badge/icon!|https://builds.apache.org/view/A-D/view/Cassandra/job/Cassandra-devbranch-dtest/696]|
> Data loss in snapshots keyspace after service restart
> -----------------------------------------------------
>
> Key: CASSANDRA-14013
> URL: https://issues.apache.org/jira/browse/CASSANDRA-14013
> Project: Cassandra
> Issue Type: Bug
> Components: Legacy/Core
> Reporter: Gregor Uhlenheuer
> Assignee: Vincent White
> Priority: Normal
>
> I am posting this bug in hope to discover the stupid mistake I am doing because I can't imagine a reasonable answer for the behavior I see right now :-)
> In short words, I do observe data loss in a keyspace called *snapshots* after restarting the Cassandra service. Say I do have 1000 records in a table called *snapshots.test_idx* then after restart the table has less entries or is even empty.
> My kind of "mysterious" observation is that it happens only in a keyspace called *snapshots*...
> h3. Steps to reproduce
> These steps to reproduce show the described behavior in "most" attempts (not every single time though).
> {code}
> # create keyspace
> CREATE KEYSPACE snapshots WITH replication = {'class': 'SimpleStrategy', 'replication_factor': 1};
> # create table
> CREATE TABLE snapshots.test_idx (key text, seqno bigint, primary key(key));
> # insert some test data
> INSERT INTO snapshots.test_idx (key,seqno) values ('key1', 1);
> ...
> INSERT INTO snapshots.test_idx (key,seqno) values ('key1000', 1000);
> # count entries
> SELECT count(*) FROM snapshots.test_idx;
> 1000
> # restart service
> kill <cassandra-pid>
> cassandra -f
> # count entries
> SELECT count(*) FROM snapshots.test_idx;
> 0
> {code}
> I hope someone can point me to the obvious mistake I am doing :-)
> This happened to me using both Cassandra 3.9 and 3.11.0
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