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Merged
merged 6 commits into from
Jul 21, 2022
Merged

Replace health request with a state observer. #88641

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10718f9
Replace health request with a state observer.
idegtiarenko Jul 20, 2022
4817492
Update docs/changelog/88641.yaml
idegtiarenko Jul 20, 2022
3360044
Add a test case
idegtiarenko Jul 21, 2022
b3b5638
bring back the test
idegtiarenko Jul 21, 2022
56609fc
rework the test
idegtiarenko Jul 21, 2022
f0441c2
remove debug info
idegtiarenko Jul 21, 2022
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5 changes: 5 additions & 0 deletions docs/changelog/88641.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
pr: 88641
summary: Replace health request with a state observer
area: Allocation
type: bug
issues: []
112 changes: 59 additions & 53 deletions .../fleet/src/main/java/org/elasticsearch/xpack/fleet/action/GetGlobalCheckpointsAction.java
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Expand Up @@ -16,11 +16,11 @@
import org.elasticsearch.action.ActionType;
import org.elasticsearch.action.IndicesRequest;
import org.elasticsearch.action.UnavailableShardsException;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.IndicesOptions;
import org.elasticsearch.client.internal.node.NodeClient;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateObserver;
import org.elasticsearch.cluster.metadata.IndexMetadata;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.routing.IndexRoutingTable;
Expand All @@ -35,8 +35,10 @@
import org.elasticsearch.index.IndexNotFoundException;
import org.elasticsearch.index.seqno.SequenceNumbers;
import org.elasticsearch.index.shard.ShardId;
import org.elasticsearch.node.NodeClosedException;
import org.elasticsearch.rest.RestStatus;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import org.elasticsearch.xcontent.ToXContent;
import org.elasticsearch.xcontent.ToXContentObject;
Expand Down Expand Up @@ -156,19 +158,22 @@ public static class TransportAction extends org.elasticsearch.action.support.Tra
private final ClusterService clusterService;
private final NodeClient client;
private final IndexNameExpressionResolver resolver;
private final ThreadPool threadPool;

@Inject
public TransportAction(
final ActionFilters actionFilters,
final TransportService transportService,
final ClusterService clusterService,
final NodeClient client,
final IndexNameExpressionResolver resolver
final IndexNameExpressionResolver resolver,
final ThreadPool threadPool
) {
super(NAME, actionFilters, transportService.getTaskManager());
this.clusterService = clusterService;
this.client = client;
this.resolver = resolver;
this.threadPool = threadPool;
}

@Override
Expand All @@ -180,7 +185,7 @@ protected void doExecute(Task task, Request request, ActionListener<Response> li
index = resolver.concreteSingleIndex(state, request);
} catch (IndexNotFoundException e) {
if (request.waitForIndex()) {
handleIndexNotReady(request, listener);
handleIndexNotReady(state, request, listener);
} else {
listener.onFailure(e);
}
Expand All @@ -194,7 +199,7 @@ protected void doExecute(Task task, Request request, ActionListener<Response> li
new CheckpointFetcher(client, request, listener, indexMetadata, request.timeout()).run();
} else {
if (request.waitForIndex()) {
handleIndexNotReady(request, listener);
handleIndexNotReady(state, request, listener);
} else {
int active = routingTable.primaryShardsActive();
int total = indexMetadata.getNumberOfShards();
Expand All @@ -205,60 +210,61 @@ protected void doExecute(Task task, Request request, ActionListener<Response> li
}
}

private void handleIndexNotReady(final Request request, final ActionListener<Response> responseListener) {
private void handleIndexNotReady(ClusterState initialState, Request request, ActionListener<Response> listener) {
long startNanos = System.nanoTime();
client.admin()
.cluster()
.prepareHealth(request.index)
.setLocal(true)
.setTimeout(request.timeout())
.setWaitForYellowStatus()
.setWaitForNoInitializingShards(true)
.execute(new ActionListener<>() {
@Override
public void onResponse(ClusterHealthResponse healthResponse) {
final long elapsedNanos = System.nanoTime() - startNanos;
final ClusterState state = clusterService.state();
final Index index;
try {
index = resolver.concreteSingleIndex(state, request);
} catch (Exception e) {
responseListener.onFailure(e);
return;
}

final IndexMetadata indexMetadata = state.getMetadata().index(index);
final IndexRoutingTable routingTable = state.routingTable().index(index);

var observer = new ClusterStateObserver(initialState, clusterService, request.timeout(), logger, threadPool.getThreadContext());

observer.waitForNextChange(new ClusterStateObserver.Listener() {
@Override
public void onNewClusterState(ClusterState state) {
try {
var index = resolver.concreteSingleIndex(state, request);
long elapsedNanos = System.nanoTime() - startNanos;
long remainingNanos = request.timeout().nanos() - elapsedNanos;
if (routingTable.allPrimaryShardsActive() && remainingNanos > 0) {
new CheckpointFetcher(
client,
request,
responseListener,
indexMetadata,
TimeValue.timeValueNanos(remainingNanos)
).run();
} else {
int active = routingTable.primaryShardsActive();
int total = indexMetadata.getNumberOfShards();
responseListener.onFailure(
new UnavailableShardsException(
null,
"Primary shards were not active within timeout [timeout={}, shards={}, active={}]",
request.timeout(),
total,
active
)
);
}
new CheckpointFetcher(
client,
request,
listener,
state.getMetadata().index(index),
TimeValue.timeValueNanos(remainingNanos)
).run();
} catch (Exception e) {
listener.onFailure(e);
}
}

@Override
public void onFailure(Exception e) {
responseListener.onFailure(e);
@Override
public void onTimeout(TimeValue timeout) {
final ClusterState state = clusterService.state();
final Index index;
try {
index = resolver.concreteSingleIndex(state, request);
listener.onFailure(
new UnavailableShardsException(
null,
"Primary shards were not active within timeout [timeout={}, shards={}, active={}]",
request.timeout(),
state.getMetadata().index(index).getNumberOfShards(),
state.routingTable().index(index).primaryShardsActive()
)
);
} catch (Exception e) {
listener.onFailure(e);
}
});
}

@Override
public void onClusterServiceClose() {
listener.onFailure(new NodeClosedException(clusterService.localNode()));
}
}, state -> {
try {
var index = resolver.concreteSingleIndex(state, request);
return state.routingTable().index(index).allPrimaryShardsActive();
} catch (Exception e) {
return false;
}
}, request.timeout());
}

private static class CheckpointFetcher extends ActionRunnable<Response> {
Expand Down