Remove index routing table of closed indices in mixed versions clusters #38955
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
tlrx
added
>enhancement
:Distributed Indexing/Distributed
|
Pinging @elastic/es-distributed |
ywelsch
approved these changes
Feb 15, 2019
henningandersen
approved these changes
Feb 18, 2019
server/src/test/java/org/elasticsearch/cluster/metadata/MetaDataIndexStateServiceTests.java
Show resolved
Hide resolved
server/src/test/java/org/elasticsearch/cluster/metadata/MetaDataIndexStateServiceTests.java
Show resolved
Hide resolved
|
Unrelated test failure: |
|
Thanks @ywelsch and @henningandersen ! |
tlrx
added a commit
that referenced
this pull request
Feb 28, 2019
Before this change, closed indexes were simply not replicated. It was therefore possible to close an index and then decommission a data node without knowing that this data node contained shards of the closed index, potentially leading to data loss. Shards of closed indices were not completely taken into account when balancing the shards within the cluster, or automatically replicated through shard copies, and they were not easily movable from node A to node B using APIs like Cluster Reroute without being fully reopened and closed again. This commit changes the logic executed when closing an index, so that its shards are not just removed and forgotten but are instead reinitialized and reallocated on data nodes using an engine implementation which does not allow searching or indexing, which has a low memory overhead (compared with searchable/indexable opened shards) and which allows shards to be recovered from peer or promoted as primaries when needed. This new closing logic is built on top of the new Close Index API introduced in 6.7.0 (#37359). Some pre-closing sanity checks are executed on the shards before closing them, and closing an index on a 8.0 cluster will reinitialize the index shards and therefore impact the cluster health. Some APIs have been adapted to make them work with closed indices: - Cluster Health API - Cluster Reroute API - Cluster Allocation Explain API - Recovery API - Cat Indices - Cat Shards - Cat Health - Cat Recovery This commit contains all the following changes (most recent first): * c6c42a1 Adapt NoOpEngineTests after #39006 * 3f9993d Wait for shards to be active after closing indices (#38854) * 5e7a428 Adapt the Cluster Health API to closed indices (#39364) * 3e61939 Adapt CloseFollowerIndexIT for replicated closed indices (#38767) * 71f5c34 Recover closed indices after a full cluster restart (#39249) * 4db7fd9 Adapt the Recovery API for closed indices (#38421) * 4fd1bb2 Adapt more tests suites to closed indices (#39186) * 0519016 Add replica to primary promotion test for closed indices (#39110) * b756f6c Test the Cluster Shard Allocation Explain API with closed indices (#38631) * c484c66 Remove index routing table of closed indices in mixed versions clusters (#38955) * 00f1828 Mute CloseFollowerIndexIT.testCloseAndReopenFollowerIndex() * e845b0a Do not schedule Refresh/Translog/GlobalCheckpoint tasks for closed indices (#38329) * cf9a015 Adapt testIndexCanChangeCustomDataPath for replicated closed indices (#38327) * b9becdd Adapt testPendingTasks() for replicated closed indices (#38326) * 02cc730 Allow shards of closed indices to be replicated as regular shards (#38024) * e53a9be Fix compilation error in IndexShardIT after merge with master * cae4155 Relax NoOpEngine constraints (#37413) * 54d110b [RCI] Adapt NoOpEngine to latest FrozenEngine changes * c63fd69 [RCI] Add NoOpEngine for closed indices (#33903) Relates to #33888
tlrx
added a commit
to tlrx/elasticsearch
that referenced
this pull request
Mar 1, 2019
…rs (elastic#38955) This pull request removes the legacy way of closing indices (aka "direct close") in mixed versions clusters, since this backward compatibility logic is not required anymore on master/8.0.0. It also changes the closing logic so that routing tables of closed indices are removed when the cluster contains a node in version < 8.0. Relates elastic#33888
tlrx
added a commit
that referenced
this pull request
Mar 1, 2019
Backport support for replicating closed indices (#39499) Before this change, closed indexes were simply not replicated. It was therefore possible to close an index and then decommission a data node without knowing that this data node contained shards of the closed index, potentially leading to data loss. Shards of closed indices were not completely taken into account when balancing the shards within the cluster, or automatically replicated through shard copies, and they were not easily movable from node A to node B using APIs like Cluster Reroute without being fully reopened and closed again. This commit changes the logic executed when closing an index, so that its shards are not just removed and forgotten but are instead reinitialized and reallocated on data nodes using an engine implementation which does not allow searching or indexing, which has a low memory overhead (compared with searchable/indexable opened shards) and which allows shards to be recovered from peer or promoted as primaries when needed. This new closing logic is built on top of the new Close Index API introduced in 6.7.0 (#37359). Some pre-closing sanity checks are executed on the shards before closing them, and closing an index on a 8.0 cluster will reinitialize the index shards and therefore impact the cluster health. Some APIs have been adapted to make them work with closed indices: - Cluster Health API - Cluster Reroute API - Cluster Allocation Explain API - Recovery API - Cat Indices - Cat Shards - Cat Health - Cat Recovery This commit contains all the following changes (most recent first): * c6c42a1 Adapt NoOpEngineTests after #39006 * 3f9993d Wait for shards to be active after closing indices (#38854) * 5e7a428 Adapt the Cluster Health API to closed indices (#39364) * 3e61939 Adapt CloseFollowerIndexIT for replicated closed indices (#38767) * 71f5c34 Recover closed indices after a full cluster restart (#39249) * 4db7fd9 Adapt the Recovery API for closed indices (#38421) * 4fd1bb2 Adapt more tests suites to closed indices (#39186) * 0519016 Add replica to primary promotion test for closed indices (#39110) * b756f6c Test the Cluster Shard Allocation Explain API with closed indices (#38631) * c484c66 Remove index routing table of closed indices in mixed versions clusters (#38955) * 00f1828 Mute CloseFollowerIndexIT.testCloseAndReopenFollowerIndex() * e845b0a Do not schedule Refresh/Translog/GlobalCheckpoint tasks for closed indices (#38329) * cf9a015 Adapt testIndexCanChangeCustomDataPath for replicated closed indices (#38327) * b9becdd Adapt testPendingTasks() for replicated closed indices (#38326) * 02cc730 Allow shards of closed indices to be replicated as regular shards (#38024) * e53a9be Fix compilation error in IndexShardIT after merge with master * cae4155 Relax NoOpEngine constraints (#37413) * 54d110b [RCI] Adapt NoOpEngine to latest FrozenEngine changes * c63fd69 [RCI] Add NoOpEngine for closed indices (#33903) Relates to #33888
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Note: this PR will be merged in the
replicated-closed-indicesfeature branchThis pull request removes the legacy way of closing indices (aka "direct close") in mixed versions clusters, since this backward compatibility logic is not required anymore on master/8.0.0.
It also changes the closing logic so that routing tables of closed indices are removed when the cluster contains a node in version < 8.0.
Relates #33888