The distribution of watches now happens on the node which holds the
watches index, instead of on the master node. This requires several
changes to the current implementation.
1. Running on shards and replicas
In order to run watches on the nodes with the watches index on its
primaries and replicas. To ensure that watches do not run twice, there is
a logic which checks the local shards, runs a murmurhash on the id and
runs modulo against the number of shards and replicas, this is the way to
find out, if a watch should run local. Reloading happens
2. Several master node actions moved to a HandledTransportAction, as they
are basically just aliases for indexing actions, among them the
put/delete/get watch actions, the acknowledgement action, the de/activate
actions
3. Stats action moved to a broadcast node action, because we potentially
have to query every node to get watcher statistics
4. Starting/Stopping watcher now is a master node action, which updates
the cluster state and then listeners acts on those. Because of this watches
can be running on two systems, if you those have different cluster state
versions, until the new watcher state is propagated
5. Watcher is started on all nodes now. With the exception of the ticker
schedule engine most classes do not need a lot of resources while running.
However they have to run, because of the execute watch API, which can hit
any node - it does not make sense to find the right shard for this watch
and only then execute (as this also has to work with a watch, that has not
been stored before)
6. By using a indexing operation listener, each storing of a watch now
parses the watch first and only stores on successful parsing
7. Execute watch API now uses the watcher threadpool for execution
8. Getting the number of watches for the stats now simply queries the
different execution engines, how many watches are scheduled, so this is
not doing a search anymore
There will be follow up commits on this one, mainly to ensure BWC compatibility.
Original commit: elastic/x-pack-elasticsearch@0adb46e658
The watcher tests were recently marked with `@Network`, which prevents them from
normally being run. Unfortunately, this means no tests run by default and the
entire suite fails.
Original commit: elastic/x-pack-elasticsearch@40cfc75b26
This commit delete the JIRA issues after the integration test execution. All issues from the testing project XWT are deleted, even if they have not been created during this specific test execution.
closeselastic/elasticsearch#4535
Original commit: elastic/x-pack-elasticsearch@0362463633
In Jira integration tests, some watches are triggered every second whereas they are executed using the watch execute API. This commit increases the triggering interval to 1d so that the watches are not executed on slow machines.
Original commit: elastic/x-pack-elasticsearch@4d0462bc00
This commit moves the Jira rest integration tests from the smoke-test-watcher-with-mustache project to the smoke-test-watcher project.
Original commit: elastic/x-pack-elasticsearch@c6b03d557f
standalone-rest-test doesn't configure unit tests and for these
integTest only projects that is what we want.
Original commit: elastic/x-pack-elasticsearch@f576dfdfbb
It used to be that RestTestPlugin "came with" StandaloneTestBasePlugin
but we'd like to use it with BuildPlugin for the high level rest client.
Also fix some license headers.
Original commit: elastic/x-pack-elasticsearch@3d5549d170
* Build: Convert xplugins to use new extra projects setup
This change makes the gradle initialization for xplugins look in the
correct location for elasticsearch, which is now as a sibling of an
elasticsearch-extra directory, with x-plugins as a child of the extra
directory.
The elasticsearch side of this change is
elastic/elasticsearchelastic/elasticsearch#21773. This change will enable renaming x-plugins
to x-pack, see elastic/elasticsearch#3643.
Original commit: elastic/x-pack-elasticsearch@09398aea5a
In order to prepare to the distributed watch execution, this commit
removes the in memory watch store.
Whenever a watch is needed now, a get request is executed and the parsing
is done. This happens when
* Put
* Get
* Ack
* Activate/Deactivate
* Execute
Note: This also means there are no usage stats currently regarding
the watch count, because we would need to execute a query. This would
require the usage stats to be async, see elastic/elasticsearch#3569
Another advantage is, that there is no dirty flag in the watch itself
needed anymore, because the watch is always the latest. Also write
operations store immediately and dont leave anything in memory.
Also ActionListener.wrap() was used a lot instead of more verbose anonmyous
inner classes.
Original commit: elastic/x-pack-elasticsearch@c47465b47c
Alexander Reelsen
Ryan Ernst
Yannick Welsch
Dimitrios Athanasiou
Lee Hinman
Tanguy Leroux
Nik Everett