With #21738 we added an indices section to the search shards api, that will return the concrete indices hit by the request, and eventually the corresponding alias filter.
The java API returns the AliasFilter object, which holds the filter itself and an array of aliases that pointed to the index in the original request. The REST layer doesn't print out the aliases array though. This commit adds the aliases array as well and tests for this.
Group, List and Affix settings generate a bogus diff that turns the actual
diff into a string containing a json structure for instance:
```
"action" : {
"search" : {
"remote" : {
"" : "{\"my_remote_cluster\":\"[::1]:60378\"}"
}
}
}
```
which make reading the setting impossible. This happens for instance
if a group or affix setting is rendered via `_cluster/settings?include_defaults=true`
This change fixes the issue as well as several minor issues with affix settings that
where not accepted as valid setting today.
Today if a comma-separated list is passed to action.auto_create_index
leading and trailing whitespaces are not trimmed but since the values are
index expressions whitespaces should be removed for convenience.
Closes#21449
* ClusterSearchShardsGroup to return ShardId rather than the int shard id
This allows more info to be retrieved, like the index uuid which is exposed through the ShardId object but was not available before
* Make ClusterSearchShardsResponse empty constructor public
This allows to receive such responses when sending ClusterSearchShardsRequests directly through TransportService (not using ClusterSearchShardsAction via Client), otherwise an empty response cannot be created unless the class that does it is in org.elasticsearch.action, admin.cluster.shards package
* adjust visibility of ClusterSearchShards members
The index uuid is unique across multiple clusters, while the index name is not. Using the index uuid to look up filters in the alias filters map is better and will be needed for multi cluster search.
If a bug occurs in painless compilation (not from a user, but from the
painless infrastructure), a VerifyError may be thrown when compiling the
broken generated class. This commit wraps VerifyErrors in
ScriptException so that useful information is returned to the user,
which can be passed on to the ES team for analysis.
This bug would cause a VerifyError when scripts using the === operator
were comparing a def type against a primitive type since the primitive
type wasn't being appropriately boxed.
This commit makes sure that there is only one instance of the two services rather than one per transport action that uses it.
Also, we take their initialization out of guice's hands by binding it to a specific instance. Otherwise those two objects would get created within a constructor that is called by guice. That may cause problem for instance when throwing an exception from such constructors as guice tries all over again to re-initialize objects and fills up logs with stacktraces.
* replace ShardRouting argument in AbstractSearchAsyncAction#onFirstPhaseResult with more contained String nodeId
There is no need to pass in ShardRouting if the only info read from it is the current node id, the shard id can be read directly from the ShardIterator that's already provided as an argument.
* avoid creating a new ShardId when creating a SearchShardTarget in SnapshotsService
Today when handling unreleased versions for backwards compatilibity
support, we scatted version constants across the code base and add some
asserts to support removing these constants when the version in question
is actually released. This commit improves this situation, enabling us
to just add a single unreleased version constant that can be renamed
when the version is actually released. This should make maintenance of
these versions simpler.
Relates #21760
NOTE: The result of `?.` and `?:` can't be assigned to primitives. So
`int[] someArray = null; int l = someArray?.length` and
`int s = params.size ?: 100` don't work. Do
`def someArray = null; def l = someArray?.length` and
`def s = params.size ?: 100` instead.
Relates to #21748
ShardSearchRequest was previously taking in the whole ShardRouting as a constructor argument while it only needs the ShardsId, changed that to carry over only the needed bits.
* Transport client: Fix remove address to actually work
The removeTransportAddress method of TransportClient removes the address
from the list of nodes that the client pings to sniff for nodes.
However, it does not remove it from the list of existing connected
nodes. This means removing a node is not possible, as long as that node
is still up.
This change removes the node from the connected nodes list before
triggering sampling (ie sniffing). While the fix is simple, testing was
not because there were no existing tests for sniffing. This change also
modifies the mocks used by transport client unit tests in order to allow
mocking sniffing.
* Scripting: Remove groovy scripting language
Groovy was deprecated in 5.0. This change removes it, along with the
legacy default language infrastructure in scripting.
The `error_trace` parameter turns on the `stack_trace` field
in errors which returns stack traces.
Removes documentation for `camelCase` because it hasn't worked
in a while....
Documents the internal parameters used to render stack traces as
internal only.
Closes#21708
This commit refactors the handling of bind permissions, which is in need
of a little cleanup. For example, in its current state, the code for
handling permissions for transport profiles is split across two
methods. This commit refactors this code hopefully making it easier to
work with in future changes. This change is mostly mechanical, no
functionality is changed.
Relates #21742
The test UnicastZenPing#testResolveTimeout chooses a random resolve
timeout between 1ms and 100ms. Close to the lower bound, this is far too
short and the test races against the concurrent resolves executing
before the timeout elapses. This commit increases the timeout to
something that is far less likely to race, yet will not slow the test
down since we are not doing resolves against a real DNS service anyway.
Note that we still want a short resolve timeout since we are testing
whether or not timeouts really work here (by latching one of the
resolves to respond slowly).
Add indices and filter information to search shards api output
The search shards api returns info about which shards are going to be hit by executing a search with provided parameters: indices, routing, preference. Indices can also be aliases, which can also hold filters. The output includes an array of shards and a summary of all the nodes the shards are allocated on. This commit adds a new indices section to the search shards output that includes one entry per index, where each index can be associated with an optional filter in case the index was hit through a filtered alias.
This is relevant since we have moved parsing of alias filters to the coordinating node.
Relates to #20916
Today there is no way to get notified if a node is disconnected. Client code
must poll the TransportClient constantly to detect that a node is not connected
anymore in order to react and add new nodes or notify altering etc. For instance
if a hostname gets resolved to an IP but that host is disconnected clients want
to reconnect by resolving the hostname again which is a common situation in cloud
environments.
Closes#21424
Today we eagerly resolve unicast hosts. This means that if DNS changes,
we will never find the host at the new address. Moreover, a single host
failng to resolve causes startup to abort. This commit introduces lazy
resolution of unicast hosts. If a DNS entry changes, there is an
opportunity for the host to be discovered. Note that under the Java
security manager, there is a default positive cache of infinity for
resolved hosts; this means that if a user does want to operate in an
environment where DNS can change, they must adjust
networkaddress.cache.ttl in their security policy. And if a host fails
to resolve, we warn log the hostname but continue pinging other
configured hosts.
When doing DNS resolutions for unicast hostnames, we wait until the DNS
lookups timeout. This appears to be forty-five seconds on modern JVMs,
and it is not configurable. If we do these serially, the cluster can be
blocked during ping for a lengthy period of time. This commit introduces
doing the DNS lookups in parallel, and adds a user-configurable timeout
for these lookups.
Relates #21630
PR #19416 added a safety mechanism to shard state fetching to only access the store when the shard lock can be acquired. This can lead to the following situation however where a shard has not fully shut down yet while the shard fetching is going on, resulting in a ShardLockObtainFailedException. PrimaryShardAllocator that decides where to allocate primary shards sees this exception and treats the shard as unusable. If this is the only shard copy in the cluster, the cluster stays red and a new shard fetching cycle will not be triggered as shard state fetching treats exceptions while opening the store as permanent failures.
This commit makes it so that PrimaryShardAllocator treats the locked shard as a possible allocation target (although with the least priority).
This commit clarifies the contract of Cache#computeIfAbsent so that an exception that occurs during the execution
of the loader is thrown to all callers. Prior to this commit, the first caller would get the ExecutionException
and other callers that called during the load execution would get null, which is confusing.
Tanguy Leroux
Achraf
Luca Cavanna
Simon Willnauer
Adrin Jalali
Clinton Gormley
markharwood
Simon Willnauer
Ryan Ernst
Jack Conradson
Jason Tedor
Nik Everett
Ahmad Ragab
David Pilato
Igor Motov
umeshdangat
jaymode
Yannick Welsch
Jay Modi