We are running apache-cassandra-3.11.4, 10 node cluster with -Xms32G -Xmx32G
-Xmn8G using CMS.
after running couple of days one of the node become unresponsive and threaddump
(jstack -F) shows deadlock.
Found one Java-level deadlock:
=
Hello,
I am trying to upgrade from 3.11.3 to 3.11.6.
Can I add new nodes with the 3.11.6 version to the cluster running with
3.11.3?
Also, I see the SSTable format changed from mc-* to md-*, does this cause
any issues?
Hi, I would say „It depends“ - as it always does. I have had a 21 Node Cluster
running in Production in one DC with versions ranging from 3.11.1 to 3.11.6
without having had any single issue for over a year. I just upgraded all nodes
to 3.11.6 for the sake of consistency.
Von meinem iPhone
In case of any issue, it gets very difficult to debug when we have multiple
versions.
On Tue, 23 Jun 2020 at 22:23, Jürgen Albersdorfer
wrote:
> Hi, I would say „It depends“ - as it always does. I have had a 21 Node
> Cluster running in Production in one DC with versions ranging from 3.11.1
>
Can you open a JIRA?
https://issues.apache.org/jira/projects/CASSANDRA/issues
On Tue, Jun 23, 2020 at 11:56 AM John Doe wrote:
> We are running apache-cassandra-3.11.4, 10 node cluster with -Xms32G
> -Xmx32G -Xmn8G using CMS.
> after running couple of days one of the node become unresponsive
Yes
here is one more example, happended on another node
using TWCS
compaction = {'class':
'org.apache.cassandra.db.compaction.TimeWindowCompactionStrategy',
'compaction_window_size': '30',
'compaction_window_unit': 'MINUTES',
'max_threshold': '32',
https://issues.apache.org/jira/browse/CASSANDRA-15898
> Sent: Tuesday, June 23, 2020 at 4:16 PM
> From: "John Doe"
> To: user@cassandra.apache.org
> Subject: Re: cassandra 3.11.4 deadlock
>
>
> Yes
> here is one more example, happended on another node
>
> using TWCS
> compaction = {'class':
Hi ,
We have recently upgraded from 3.11.0 to 3.11.5 . There is a sstable format
change from 3.11.4 .
We also had to expand the cluster and we also discussed about expansion
first and than upgrade. But finally we upgraded and than expanded.
As per our experience what I could tell you is, it is
