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Posted to commits@cassandra.apache.org by "Hervé Toulan (JIRA)" <ji...@apache.org> on 2017/06/26 11:01:00 UTC
[jira] [Created] (CASSANDRA-13637) data updated to old value after
flushing largest CFS
Hervé Toulan created CASSANDRA-13637:
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Summary: data updated to old value after flushing largest CFS
Key: CASSANDRA-13637
URL: https://issues.apache.org/jira/browse/CASSANDRA-13637
Project: Cassandra
Issue Type: Bug
Components: Core
Environment: RHEL 6.6 64 bits
Cassandra 2.2.6 with replication factor of 2
2 servers in the Cassandra ring.
One server is down for maintenance for more than 24 hours
Reporter: Hervé Toulan
Fix For: 2.2.6
Attachments: local.zip
VitualMachine 1 : application server + Cassandra 1
VirtualMachine 2: application server + Cassandra 2
Cassandra1 and Cassandra2 are the only members of the Cassandra ring.
I expect Cassandra to always be synchronized as soon as VM1 and Vm2 can communicate.
Applicaiton server (AS1) of VM1 writes a value to Cassandra (a date).
VM1 is shot down.
VM2 reads the value written by AS1 as expected.
Cassandra of VM2 perform a flush operation.
VM2 reads the value older than the exp
ected one, the last value written by AS1.
I've lost the last inserted data, and I don't understand why.
In attached log bcs.log the read in DB:
2.4.0.1-SNAPSHOT - LCL - 26 Jun 2017 07:15:47,959 INFO [RMI TCP Connection(111)-172.25.153.163] - Cassandra supervisor : check OK : last generation of CDR is : {color:red}Sun Jun 25 00:10:53 CEST 2017{color}
2.4.0.1-SNAPSHOT - LCL - 26 Jun 2017 07:16:47,963 INFO [RMI TCP Connection(113)-172.25.153.163] - Cassandra supervisor : check OK : last generation of CDR is : {color:red}Thu Jun 22 07:16:10 CEST 2017{color}
Nothing has been inserted in database between the 2 logs but in debug.log from Cassandra I can see a flush operation the 2017-06-24 at 07:16:37,056.
What did we miss ?
How data can be overwritten ?
Regards,
Hervé
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