>
> I was having issues with elasticsearch now too since I rebooted my server.

  
I'm running Zammad on Centos and installed it as a Package. 

After the reboot the elasticsearch.log hit these errors:












*[2017-06-14T16:31:12,424][ERROR][o.e.b.Bootstrap          ] 
Exceptionjava.lang.IllegalArgumentException: plugin [mapper-attachments] is 
incompatible with version [5.4.1]; was designed for version [5.4.0]        
at 
org.elasticsearch.plugins.PluginInfo.readFromProperties(PluginInfo.java:146) 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Spawner.spawnNativePluginControllers(Spawner.java:86)
 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:167) 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:350) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67)
 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.Command.main(Command.java:88) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) 
[elasticsearch-5.4.1.jar:5.4.1]*











*[2017-06-14T16:31:12,424][ERROR][o.e.b.Bootstrap          ] 
Exceptionjava.lang.IllegalArgumentException: plugin [mapper-attachments] is 
incompatible with version [5.4.1]; was designed for version [5.4.0]        
at 
org.elasticsearch.plugins.PluginInfo.readFromProperties(PluginInfo.java:146) 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Spawner.spawnNativePluginControllers(Spawner.java:86)
 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:167) 
~[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:350) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67)
 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.cli.Command.main(Command.java:88) 
[elasticsearch-5.4.1.jar:5.4.1]        at 
org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) 
[elasticsearch-5.4.1.jar:5.4.1]*

So I checked:  *cat /var/log/yum.log |grep elasticsearch*
Output*:*


*May 17 22:48:32 Installed: elasticsearch-5.4.0-1.noarchJun 01 21:45:25 
Updated: elasticsearch-5.4.1-1.noarch*

I did some updates recently and so I guessed I had to rollback.

Luckily Centos offers an easy way to rollback packages so i did: *yum 
downgrade elasticsearch-5.4.0-1.noarch*

followed by: 

*systemctl daemon-reload*
*systemctl restart elasticsearch*

The logs were fine after that and the search function works as usual. 
Perhaps I have to recreate the indexes but I have to dig into the manual on 
how to do that. 

Sincerely 
Sebastian 









 

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