[Close Index API] Add TransportShardCloseAction for pre-closing verifications #36249
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tlrx
added
>enhancement
v7.0.0
:Distributed Indexing/Distributed
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Pinging @elastic/es-distributed |
tlrx
commented
Dec 5, 2018
| import org.elasticsearch.threadpool.ThreadPool; | ||
| import org.elasticsearch.transport.TransportService; | ||
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| public class TransportShardCloseAction extends TransportReplicationAction<ShardCloseRequest, ShardCloseRequest, ReplicationResponse> { |
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I hesitated on the name of the action and request as it does not really close the shard. Suggestions welcome.
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TransportVerifyShardBeforeCloseAction? I know it's long, but it's OK, I think.
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Thanks for the suggestion - verbose but better than TransportShardCloseAction
bleskes
approved these changes
Dec 5, 2018
| import org.elasticsearch.threadpool.ThreadPool; | ||
| import org.elasticsearch.transport.TransportService; | ||
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| public class TransportShardCloseAction extends TransportReplicationAction<ShardCloseRequest, ShardCloseRequest, ReplicationResponse> { |
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TransportVerifyShardBeforeCloseAction? I know it's long, but it's OK, I think.
| import org.elasticsearch.action.support.replication.ReplicationRequest; | ||
| import org.elasticsearch.index.shard.ShardId; | ||
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| public class ShardCloseRequest extends ReplicationRequest<ShardCloseRequest> { |
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can we just inline this in the transport action file? I don't see the need for another file.
| final IndicesService indicesService, final ThreadPool threadPool, final ShardStateAction stateAction, | ||
| final ActionFilters actionFilters, final IndexNameExpressionResolver indexNameExpressionResolver) { | ||
| super(settings, NAME, transportService, clusterService, indicesService, threadPool, stateAction, | ||
| actionFilters, indexNameExpressionResolver, ShardCloseRequest::new, ShardCloseRequest::new, ThreadPool.Names.GENERIC); |
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I think we want a management thread pool here?
| + "] mismatches maximum sequence number [" + maxSeqNo + "] on index shard " + shardId); | ||
| } | ||
| indexShard.flush(new FlushRequest()); | ||
| logger.debug("shard {} is ready for closing", shardId); |
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can we put the shardId first in the log line so it will look like [index][0] shard is ready for closing ?
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Thanks @bleskes |
tlrx
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Dec 13, 2018
The commit changes how indices are closed in the MetaDataIndexStateService. It now uses a 3 steps process where writes are blocked on indices to be closed, then some verifications are done on shards using the TransportVerifyShardBeforeCloseAction added in #36249, and finally indices states are moved to CLOSE and their routing tables removed. The closing process also takes care of using the pre-7.0 way to close indices if the cluster contains mixed version of nodes and a node does not support the TransportVerifyShardBeforeCloseAction. It also closes unassigned indices. Related to #33888
tlrx
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Jan 14, 2019
This commit backports to 6.x of the Close Index API refactoring. It cherry-picks the following commits from master: 3ca885e [Close Index API] Add TransportShardCloseAction for pre-closing verifications (#36249) 8e5dd20 [Close Index API] Refactor MetaDataIndexStateService (#36354) 7372529 [Tests] Reduce randomization in CloseWhileRelocatingShardsIT (#36694) 103c4d4 [Close Index API] Mark unavailable shard copy as stale during verification (#36755) 1959388 [Close Index API] Propagate tasks ids between Freeze, Close and Verify(#36630) e149b08 [Close Index API] Add unique UUID to ClusterBlock (#36775) dc371ef [Tests] Fix ReopenWhileClosingIT with correct min num shards The following two commits were needed to adapt the change to 6.x: ef6ae69 [Close Index API] Adapt MetaDataIndexStateServiceTests after merge 21b7653 [Tests] Adapt CloseIndexIT tests for 6.x Related to #33888
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Note: this pull request will be merged in the
close-index-api-refactoringbranchThis pull request adds the
TransportShardCloseActionwhich is a transport replication action that acquires all index shard permits for its execution. This action will be used in the future by theMetaDataIndexStateServicein a new index closing process, where we need to execute some sanity checks before closing an index.The action executes the following verifications on the primary and replicas:
When the verifications are done and successful, the shard is flushed.
Once this pull request is merged, a follow up pull request will change the
MetaDataIndexStateServiceto make use of this new transport action.