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Also removed the version checking from the index template support, so that if the settings are changed these settings always get stored in the index template. This means we always put two index templates once watcher started. And also shutdown watcher after the cluster service has been stopped. This was done caused deadlock in the integration test framework when we are stopping the test cluster. If multiple nodes are stopped, a node may briefly try to or run Watcher during the test cluster shutdown. As part if starting we always put an index template, which will block any other start or stop calls for the WatcherService. A node was running a put index template call as part of the start procedure while the start framework would stop the node. The stop call would wait because it doesn't own the lock yet. The put index template call didn't return, which caused the stop call the keep waiting. The reason why put index template was hanging is that it failed to return anything while it the node was stopped. Likely the put index template request got queued up waiting for a change in the cluster state, the cluster service got stopped and the request got lost, but the watcher start procedure was still waiting. By stopping Watcher before we stop the cluster service we avoid the scenario described above. Original commit: elastic/x-pack-elasticsearch@db94b2279e
= Elasticsearch Watcher Plugin This plugins adds conditioned scheduled tasks features to elasticsearch - such a task is called a `Watch`. You can build the plugin with `mvn package`. The documentation is put in the `docs/` directory.