Expected behavior:

Search somethign and get an result

Actual behavior:

Search something and don’t get an result

Steps to reproduce the behavior:

Search Something Customer or Ticket

First i checked elastic searched, it stopped working, i restartet it and it shows now status running but i still cant search for tickets or customer.

It seems that elastic search crashed again

   xx@xx:/var/log$ systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)
   Active: active (running) since Tue 2019-02-26 09:11:31 CET; 2s ago
     Docs: http://www.elastic.co
  Process: 2449 ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec (code=exited, status=0/SUCCESS)
 Main PID: 2452 (java)
    Tasks: 17
   Memory: 1.2G
      CPU: 3.130s
   CGroup: /system.slice/elasticsearch.service
           ‣ 2452 [java]
xx@xx:/var/log$ systemctl status elasticsearch
● elasticsearch.service - Elasticsearch
   Loaded: loaded (/usr/lib/systemd/system/elasticsearch.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Tue 2019-02-26 09:11:33 CET; 4s ago
     Docs: http://www.elastic.co
  Process: 2452 ExecStart=/usr/share/elasticsearch/bin/elasticsearch -p ${PID_DIR}/elasticsearch.pid --quiet -Edefault.path.logs=${LOG_DIR} -Edefault.path.data=${DATA_DIR} -Edefault.path.conf=${CONF_DIR} (code=e
  Process: 2449 ExecStartPre=/usr/share/elasticsearch/bin/elasticsearch-systemd-pre-exec (code=exited, status=0/SUCCESS)
 Main PID: 2452 (code=exited, status=1/FAILURE)

Latest ES.log

   [2019-02-26T08:52:39,614][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.IllegalArgumentException: plugin [ingest-attachment] is incompatible with version [5.6.15]; was designed for version [5.6.14]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:136) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:123) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:70) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) ~[elasticsearch-5.6.15.jar:5.6.15]
Caused by: java.lang.IllegalArgumentException: plugin [ingest-attachment] is incompatible with version [5.6.15]; was designed for version [5.6.14]
    at org.elasticsearch.plugins.PluginInfo.readFromProperties(PluginInfo.java:146) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Spawner.spawnNativePluginControllers(Spawner.java:80) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:168) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:342) ~[elasticsearch-5.6.15.jar:5.6.15]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:132) ~[elasticsearch-5.6.15.jar:5.6.15]
    ... 6 more

Could you please clarify the system you installed Zammad on?
If this is really a Windows base below (no matter if they support some Ubuntu-ish stuff as integration), we are not able to support that.

We will never as well, this has too many aspects that can ruin your fun and I suggest you don’t take that productive.

For user who also encaounters this error after an update of elastic search via apt-get.

This will update the plugin an everything will work again.

If you want to download and install by hand use this as source:
https://jar-download.com/?search_box=ingest-attachment