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https://issues.apache.org/jira/browse/CASSANDRA-8917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14352059#comment-14352059
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Robert Stupp commented on CASSANDRA-8917:
-----------------------------------------

What I've seen from your logs:
* node3 went down at approx 19:01
* node3 was started at approx 19:11
* node3 went down at approx 19:14
* node3 was started at approx 19:41 with this neat message: {{Node 
localhost/127.0.0.1 state jump to normal}} - looks like a configuration mistake 
(I assume you don't want 127.0.0.1).

Another thing I've noticed is a lot of {{HintedHandoffMetrics.java (line 79) 
/10.6.71.198 has 119756 dropped hints, because node is down past configured 
hint window.}} messages appearing every some minutes for example on node1. Did 
you reconfigure the {{max_hint_window_in_ms}} parameter in {{cassandra.yaml}} - 
maybe too low?

> Upgrading from 2.0.9 to 2.1.3 with 3 nodes, CL = quorum causes exceptions
> -------------------------------------------------------------------------
>
>                 Key: CASSANDRA-8917
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-8917
>             Project: Cassandra
>          Issue Type: Bug
>         Environment: C* 2.0.9, Centos 6.5, Java 1.7.0_72, spring data 
> cassandra 1.1.1, cassandra java driver 2.0.9
>            Reporter: Gary Ogden
>         Attachments: b_output.log, jersey_error.log, node1-system.log, 
> node2-system.log, node3-system.log
>
>
> We have java apps running on glassfish that read/write to our 3 node cluster 
> running on 2.0.9. 
> we have the CL set to quorum for all reads and writes.
> When we started to upgrade the first node and did the sstable upgrade on that 
> node, we started getting this error on reads and writes:
> com.datastax.driver.core.exceptions.UnavailableException: Not enough replica 
> available for query at consistency QUORUM (2 required but only 1 alive)
> How is that possible when we have 3 nodes total, and there was 2 that were up 
> and it's saying we can't get the required CL?



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