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https://issues.apache.org/jira/browse/CASSANDRA-18153?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17682562#comment-17682562
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Stefan Miklosovic commented on CASSANDRA-18153:
-----------------------------------------------

[~jlewandowski] thanks for the feedback. I modified the PR to reflect your 
worries. I am not saying it is bulletproof but the main idea behind the latest 
changes is that I tried to do it in such a way that if somebody reads these 
values they can not be written and vice versa - achieved by 
ReentrantReadWriteLock (there will be probably still some bugs in there we can 
work out but as POC to review it is good enough, probably).

> Memtable being flushed without hostId in version "me" and newer during 
> CommitLogReplay
> --------------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-18153
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-18153
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Local/SSTable
>            Reporter: Adriano Bonacin
>            Assignee: Adriano Bonacin
>            Priority: Normal
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> On ticket CASSANDRA-16619 some files were changed to allow Cassandra to store 
> HostID in the new "me" SSTable version.
> But SSTables flushed during CommitLogReplay miss this HostID info.
>  
> In the next Cassandra startup, if these SSTables were still present, 
> system.log will show:
> {{WARN Origin of 3 sstables is unknown or doesn't match the local node; 
> commitLogIntervals for them were ignored}}
> {{WARN }}{{{}Origin of 3 sstables is unknown or doesn't match the local node; 
> commitLogIntervals for them were ignored{}}}{{{}{}}}{{ }}
>  
> And debug.log will show a list of SSTables, witch can include "md" and "me" 
> version (before upgradesstables):
>  
> {{Ignored commitLogIntervals from the following sstables: 
> [/var/lib/cassandra/data/system/compaction_history-b4dbb7b4dc493fb5b3bfce6e434832ca/me-3-big-Data.db,
>  
> /var/lib/cassandra/data/system/compaction_history-b4dbb7b4dc493fb5b3bfce6e434832ca/md-1-big-Data.db,
>  
> /var/lib/cassandra/data/system/compaction_history-b4dbb7b4dc493fb5b3bfce6e434832ca/md-2-big-Data.db]}}
>  
> https://issues.apache.org/jira/browse/CASSANDRA-16619



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