* Use `_count` aggregation value only for not-DISTINCT COUNT function calls
* COUNT DISTINCT will use the _exact_ version of a field (the `keyword` sub-field for example), if there is one
Traditionally remote clusters can be configured dynamically. However,
the compress and ping settings are not currently set to be configured
dynamically. This commit changes that.
This commit implements a straightforward approach to retention lease
expiration. Namely, we inspect which leases are expired when obtaining
the current leases through the replication tracker. At that moment, we
clean the map that persists the retention leases in memory.
This commit converts the epoch time parsing implementation which uses
the java time api to create DateTimeFormatters instead of DateFormatter
implementations. This will allow multi formats for java time to be
implemented in a single DateTimeFormatter in a future change.
Remove several unused helper methods. Most of them are one-liners and should
be easier to be used from the corresponding primitive wrapper classes.
The bytes array conversion methods are unused as well, it should be easy to
re-create them if needed.
This commit fixes an issue with a settings builder method that allows
setting a duration by time unit. In particular, this method can suffer
from a loss of precision. For example, if the input duration is 1500
microseconds then internally we are converting this to "1ms",
demonstrating the loss of precision. Instead, we should internally
convert this to a TimeValue that correctly represents the input
duration, and then convert this to a string using a method that does not
lose the unit. That is what this commit does.
Version needs to be updated after backporting #36997 & #37142
where we added support for providing and serializing localClusterAlias
as well ass absoluteStartMillis.
Relates to #36997 & #37142
Today, a setting can declare that its validity depends on the values of other
related settings. However, the validity of a setting is not always checked
against the correct values of its dependent settings because those settings'
correct values may not be available when the validator runs.
This commit separates the validation of a settings updates into two phases,
with separate methods on the `Setting.Validator` interface. In the first phase
the setting's validity is checked in isolation, and in the second phase it is
checked again against the values of its related settings. Most settings only
use the first phase, and only the few settings with dependencies make use of
the second phase.
The `cluster.unsafe_initial_master_node_count` setting was introduced as a
temporary measure while the design of `cluster.initial_master_nodes` was being
finalised. This commit removes this temporary setting, replacing it with usages
of `cluster.initial_master_nodes` where appropriate.
This commit adds a unique id to cluster blocks, so that they can be uniquely
identified if needed. This is important for the Close Index API where multiple
concurrent closing requests can be executed at the same time. By adding a
UUID to the cluster block, we can generate unique "closing block" that can
later be verified on shards and then checked again from the cluster state
before closing the index. When the verification on shard is done, the closing
block is replaced by the regular INDEX_CLOSED_BLOCK instance.
If something goes wrong, calling the Open Index API will remove the block.
Related to #33888
This commit is the first in a series which will culminate with
fully-functional shard history retention leases.
Shard history retention leases are aimed at preventing shard history
consumers from having to fallback to expensive file copy operations if
shard history is not available from a certain point. These consumers
include following indices in cross-cluster replication, and local shard
recoveries. A future consumer will be the changes API.
Further, index lifecycle management requires coordinating with some of
these consumers otherwise it could remove the source before all
consumers have finished reading all operations. The notion of shard
history retention leases that we are introducing here will also be used
to address this problem.
Shard history retention leases are a property of the replication group
managed under the authority of the primary. A shard history retention
lease is a combination of an identifier, a retaining sequence number, a
timestamp indicating when the lease was acquired or renewed, and a
string indicating the source of the lease. Being leases they have a
limited lifespan that will expire if not renewed. The idea of these
leases is that all operations above the minimum of all retaining
sequence numbers will be retained during merges (which would otherwise
clear away operations that are soft deleted). These leases will be
periodically persisted to Lucene and restored during recovery, and
broadcast to replicas under certain circumstances.
This commit is merely putting the basics in place. This first commit
only introduces the concept and integrates their use with the soft
delete retention policy. We add some tests to demonstrate the basic
management is correct, and that the soft delete policy is correctly
influenced by the existence of any retention leases. We make no effort
in this commit to implement any of the following:
- timestamps
- expiration
- persistence to and recovery from Lucene
- handoff during primary relocation
- sharing retention leases with replicas
- exposing leases in shard-level statistics
- integration with cross-cluster replication
These will occur individually in follow-up commits.
This commit addresses an issue when setting a byte size value setting
using a value that has a fractional component when converted to its
string representation. For example, trying to set a byte size value
setting to a value of 1536 bytes is problematic because internally this
is converted to the string "1.5k". When we go to get this setting, we
try to parse "1.5k" back to a byte size value, which does not support
fractional values. The problem is that internally we are relying on a
method which loses the unit when doing the string conversion. Instead,
we are going to use a method that does not lose the unit and therefore
we can roundtrip from the byte size value to the string and back to the
byte size value.
* Randomly doing non-atomic writes causes rare 0 byte reads from `index-N` files in tests
* Removing this randomness fixes these random failures and is valid because it does not reproduce a real-world failure-mode:
* Cloud-based Blob stores (S3, GCS, and Azure) do not have inconsistent partial reads of a blob, either you read a complete blob or nothing on them
* For file system based blob stores the atomic move we do (to atomically write a file) by setting `java.nio.file.StandardCopyOption#ATOMIC_MOVE` would throw if the file system does not provide for atomic moves
* Closes#37005
The initialization of a suite scope cluster had some sideffects on
subsequent runs which causes issues when tests must be reproduced.
This moves the suite scope initialization to a privte random context.
Closes#36202
I started referring to this parameter name from various places in #37149 so I
think it's a good idea to simplify things by referring to a common constant.
We have recently added support for providing a local cluster alias to a
SearchRequest through a package protected constructor. When executing
cross-cluster search requests with local reduction on each cluster, the
CCS coordinating node will have to provide such cluster alias to each
remote cluster, as well as the absolute start time of the search action
in milliseconds from the time epoch, to be used when evaluating date
math expressions both while executing queries / scripts as well as when
resolving index names.
This commit adds support for providing the start time together with the
cluster alias. It is a final member in the search request, which will
only be set when using cross-cluster search with local reduction (also
known as alternate execution mode). When not provided, the coordinating
node will determine the current time and pass it through (by calling
`System.currentTimeMillis`).
Relates to #32125
This pull request changes the Freeze Index and Close Index actions so
that these actions always requires a Task. The task's id is then propagated
from the Freeze action to the Close action, and then to the Verify shard action.
This way it is possible to track which Freeze task initiates the closing of an index,
and which consecutive verifiy shard are executed for the index closing.
As suggested in #36775, this pull request renames the following methods:
ClusterBlocks.hasGlobalBlock(int)
ClusterBlocks.hasGlobalBlock(RestStatus)
ClusterBlocks.hasGlobalBlock(ClusterBlockLevel)
to something that better reflects the property of the ClusterBlock that is searched for:
ClusterBlocks.hasGlobalBlockWithId(int)
ClusterBlocks.hasGlobalBlockWithStatus(RestStatus)
ClusterBlocks.hasGlobalBlockWithLevel(ClusterBlockLevel)
Improve error message returned to the client when an SQL statement
cannot be translated to a ES query DSL. Cases:
1. WHERE clause evaluates to FALSE => No results returned
1. Missing FROM clause => Local execution, e.g.: SELECT SIN(PI())
3. Special SQL command => Only valid of SQL iface, e.g.: SHOW TABLES
Fixes: #37040
This commit addresses an issue when setting a time value setting using a
value that has a fractional component when converted to its string
representation. For example, trying to set a time value setting to a
value of 1500ms is problematic because internally this is converted to
the string "1.5s". When we go to get this setting, we try to parse
"1.5s" back to a time value, which does not support fractional
values. The problem is that internally we are relying on a method which
loses the unit when doing the string conversion. Instead, we are going
to use a method that does not lose the unit and therefore we can
roundtrip from the time value to the string and back to the time value.
Logical operators OR and AND as well as conditional functions
(COALESCE, LEAST, GREATEST, etc.) cannot be folded to NULL if one
of their children is NULL as is the case for most of the functions.
Therefore, their nullable() implementation cannot return true. On
the other hand they cannot return false as if they're wrapped within
an IS NULL or IS NOT NULL expression, the expression will be folded
to false and true respectively leading to wrong results.
Change the signature of nullable() method and add a third value UKNOWN
to handle these cases.
Fixes: #35872
* The retries on the failing master can lead to concurrently trying to create and delete a snapshot, catch this for now to fix this test
* closes#36779
We don't want two FSDirectories manage pending deletes separately
and optimize file listing. This confuses IndexWriter and causes exceptions
when files are deleted twice but are pending for deletion. This change
move to using a NIOFS subclass that only delegates to MMAP for opening files
all metadata and pending deletes are managed on top.
Closes#37111
Relates to #36668
The query object was incorrectly added to the remote object in the
xcontent. This fix moves the query back into the source, if it was
passed in as part of the RemoteInfo. It also adds a IPv6 test for
reindex from remote such that we can properly validate this.
In Lucene 8 searches can skip non-competitive hits if the total hit count is not requested.
It is also possible to track the number of hits up to a certain threshold. This is a trade off to speed up searches while still being able to know a lower bound of the total hit count. This change adds the ability to set this threshold directly in the track_total_hits search option. A boolean value (true, false) indicates whether the total hit count should be tracked in the response. When set as an integer this option allows to compute a lower bound of the total hits while preserving the ability to skip non-competitive hits when enough matches have been collected.
Relates #33028
Tanguy Leroux
Martijn van Groningen
Andrew Banchich
Luca Cavanna
Andrei Stefan
Tim Brooks
Jason Tedor
Julie Tibshirani
Ryan Ernst
Christoph Büscher
lcawl
Benjamin Trent
Christophe Bismuth
David Turner
Alpar Torok
Armin Braun
Josh Soref
Simon Willnauer
David Kyle
Marios Trivyzas
Michael Basnight
Jim Ferenczi
Adam Thomson