Examples with FlushRequest org.elasticsearch.action.admin.indices.flush.FlushRequest used on opensource projects

Example 21 with FlushRequest

use of org.elasticsearch.action.admin.indices.flush.FlushRequest in project crate by crate.

the class TransportVerifyShardBeforeCloseAction method executeShardOperation.

private void executeShardOperation(final ShardRequest request, final IndexShard indexShard) throws IOException {
    final ShardId shardId = indexShard.shardId();
    if (indexShard.getActiveOperationsCount() != IndexShard.OPERATIONS_BLOCKED) {
        throw new IllegalStateException("Index shard " + shardId + " is not blocking all operations during closing");
    }
    final ClusterBlocks clusterBlocks = clusterService.state().blocks();
    if (clusterBlocks.hasIndexBlock(shardId.getIndexName(), request.clusterBlock()) == false) {
        throw new IllegalStateException("Index shard " + shardId + " must be blocked by " + request.clusterBlock() + " before closing");
    }
    if (request.isPhase1()) {
        // in order to advance the global checkpoint to the maximum sequence number, the (persisted) local checkpoint needs to be
        // advanced first, which, when using async translog syncing, does not automatically hold at the time where we have acquired
        // all operation permits. Instead, this requires and explicit sync, which communicates the updated (persisted) local checkpoint
        // to the primary (we call this phase1), and phase2 can then use the fact that the global checkpoint has moved to the maximum
        // sequence number to pass the verifyShardBeforeIndexClosing check and create a safe commit where the maximum sequence number
        // is equal to the global checkpoint.
        indexShard.sync();
    } else {
        indexShard.verifyShardBeforeIndexClosing();
        indexShard.flush(new FlushRequest().force(true).waitIfOngoing(true));
        logger.trace("{} shard is ready for closing", shardId);
    }
}

Example 22 with FlushRequest

use of org.elasticsearch.action.admin.indices.flush.FlushRequest in project crate by crate.

the class IndexShard method resetEngineToGlobalCheckpoint.

/**
 * Rollback the current engine to the safe commit, then replay local translog up to the global checkpoint.
 */
void resetEngineToGlobalCheckpoint() throws IOException {
    assert Thread.holdsLock(mutex) == false : "resetting engine under mutex";
    assert getActiveOperationsCount() == OPERATIONS_BLOCKED : "resetting engine without blocking operations; active operations are [" + getActiveOperations() + ']';
    // persist the global checkpoint to disk
    sync();
    final SeqNoStats seqNoStats = seqNoStats();
    final TranslogStats translogStats = translogStats();
    // flush to make sure the latest commit, which will be opened by the read-only engine, includes all operations.
    flush(new FlushRequest().waitIfOngoing(true));
    SetOnce<Engine> newEngineReference = new SetOnce<>();
    final long globalCheckpoint = getLastKnownGlobalCheckpoint();
    assert globalCheckpoint == getLastSyncedGlobalCheckpoint();
    synchronized (engineMutex) {
        verifyNotClosed();
        // we must create both new read-only engine and new read-write engine under engineMutex to ensure snapshotStoreMetadata,
        // acquireXXXCommit and close works.
        final Engine readOnlyEngine = new ReadOnlyEngine(newEngineConfig(replicationTracker), seqNoStats, translogStats, false, Function.identity()) {

            @Override
            public IndexCommitRef acquireLastIndexCommit(boolean flushFirst) {
                synchronized (engineMutex) {
                    if (newEngineReference.get() == null) {
                        throw new AlreadyClosedException("engine was closed");
                    }
                    // ignore flushFirst since we flushed above and we do not want to interfere with ongoing translog replay
                    return newEngineReference.get().acquireLastIndexCommit(false);
                }
            }

            @Override
            public IndexCommitRef acquireSafeIndexCommit() {
                synchronized (engineMutex) {
                    if (newEngineReference.get() == null) {
                        throw new AlreadyClosedException("engine was closed");
                    }
                    return newEngineReference.get().acquireSafeIndexCommit();
                }
            }

            @Override
            public void close() throws IOException {
                assert Thread.holdsLock(engineMutex);
                Engine newEngine = newEngineReference.get();
                if (newEngine == currentEngineReference.get()) {
                    // we successfully installed the new engine so do not close it.
                    newEngine = null;
                }
                IOUtils.close(super::close, newEngine);
            }
        };
        IOUtils.close(currentEngineReference.getAndSet(readOnlyEngine));
        newEngineReference.set(engineFactory.newReadWriteEngine(newEngineConfig(replicationTracker)));
        onNewEngine(newEngineReference.get());
    }
    final Engine.TranslogRecoveryRunner translogRunner = (engine, snapshot) -> runTranslogRecovery(engine, snapshot, Engine.Operation.Origin.LOCAL_RESET, () -> {
    // TODO: add a dedicate recovery stats for the reset translog
    });
    newEngineReference.get().recoverFromTranslog(translogRunner, globalCheckpoint);
    newEngineReference.get().refresh("reset_engine");
    synchronized (engineMutex) {
        verifyNotClosed();
        IOUtils.close(currentEngineReference.getAndSet(newEngineReference.get()));
        // We set active because we are now writing operations to the engine; this way,
        // if we go idle after some time and become inactive, we still give sync'd flush a chance to run.
        active.set(true);
    }
    // time elapses after the engine is created above (pulling the config settings) until we set the engine reference, during
    // which settings changes could possibly have happened, so here we forcefully push any config changes to the new engine.
    onSettingsChanged();
}

Example 23 with FlushRequest

use of org.elasticsearch.action.admin.indices.flush.FlushRequest in project graylog2-server by Graylog2.

the class IndicesAdapterES7 method flush.

@Override
public void flush(String index) {
    final FlushRequest request = new FlushRequest(index);
    client.execute((c, requestOptions) -> c.indices().flush(request, requestOptions), "Unable to flush index " + index);
}