use of io.confluent.ksql.physical.scalablepush.locator.PushLocator.KsqlNode in project ksql by confluentinc.
the class PushRouting method connectToHosts.
/**
* Connects to all of the hosts provided.
* @return A future for a PushConnectionsHandle, which can be used to terminate connections.
*/
@SuppressWarnings("checkstyle:ParameterNumber")
private CompletableFuture<PushConnectionsHandle> connectToHosts(final ServiceContext serviceContext, final PushPhysicalPlanManager pushPhysicalPlanManager, final ConfiguredStatement<Query> statement, final Collection<KsqlNode> hosts, final LogicalSchema outputSchema, final TransientQueryQueue transientQueryQueue, final PushConnectionsHandle pushConnectionsHandle, final boolean dynamicallyAddedNode, final Optional<ScalablePushQueryMetrics> scalablePushQueryMetrics, final Set<KsqlNode> catchupHosts, final PushRoutingOptions pushRoutingOptions, final String thisHostName) {
final Map<KsqlNode, CompletableFuture<RoutingResult>> futureMap = new LinkedHashMap<>();
for (final KsqlNode node : hosts) {
pushConnectionsHandle.add(node, new RoutingResult(RoutingResultStatus.IN_PROGRESS, () -> {
}));
final CompletableFuture<Void> callback = new CompletableFuture<>();
callback.handle((v, t) -> {
if (t == null) {
pushConnectionsHandle.get(node).ifPresent(result -> {
result.close();
result.updateStatus(RoutingResultStatus.COMPLETE);
});
LOG.info("Host {} completed request {}.", node, pushPhysicalPlanManager.getQueryId());
} else if (t instanceof GapFoundException) {
pushConnectionsHandle.get(node).ifPresent(result -> {
result.close();
result.updateStatus(RoutingResultStatus.OFFSET_GAP_FOUND);
});
} else {
pushConnectionsHandle.completeExceptionally(t);
}
return null;
});
futureMap.put(node, executeOrRouteQuery(node, statement, serviceContext, pushPhysicalPlanManager, outputSchema, transientQueryQueue, callback, scalablePushQueryMetrics, pushConnectionsHandle.getOffsetsTracker(), catchupHosts.contains(node), pushRoutingOptions, thisHostName));
}
return CompletableFuture.allOf(futureMap.values().toArray(new CompletableFuture[0])).thenApply(v -> {
for (final KsqlNode node : hosts) {
final CompletableFuture<RoutingResult> future = futureMap.get(node);
final RoutingResult routingResult = future.join();
pushConnectionsHandle.add(node, routingResult);
}
return pushConnectionsHandle;
}).exceptionally(t -> {
final KsqlNode node = futureMap.entrySet().stream().filter(e -> e.getValue().isCompletedExceptionally()).map(Entry::getKey).findFirst().orElse(null);
for (KsqlNode n : hosts) {
final CompletableFuture<RoutingResult> future = futureMap.get(n);
// Take whatever completed exceptionally and mark it as failed
if (future.isCompletedExceptionally()) {
pushConnectionsHandle.get(n).ifPresent(result -> result.updateStatus(RoutingResultStatus.FAILED));
} else {
final RoutingResult routingResult = future.join();
pushConnectionsHandle.add(node, routingResult);
}
}
LOG.warn("Error routing query {} id {} to host {} at timestamp {} with exception {}", statement.getStatementText(), pushPhysicalPlanManager.getQueryId(), node, System.currentTimeMillis(), t.getCause());
// retries in that case and don't fail the original request.
if (!dynamicallyAddedNode) {
pushConnectionsHandle.completeExceptionally(new KsqlException(String.format("Unable to execute push query \"%s\". %s", statement.getStatementText(), t.getCause().getMessage())));
}
return pushConnectionsHandle;
}).exceptionally(t -> {
LOG.error("Unexpected error handing exception", t);
return pushConnectionsHandle;
});
}
use of io.confluent.ksql.physical.scalablepush.locator.PushLocator.KsqlNode in project ksql by confluentinc.
the class PushRouting method checkForNewHosts.
private void checkForNewHosts(final ServiceContext serviceContext, final PushPhysicalPlanManager pushPhysicalPlanManager, final ConfiguredStatement<Query> statement, final LogicalSchema outputSchema, final TransientQueryQueue transientQueryQueue, final PushConnectionsHandle pushConnectionsHandle, final Optional<ScalablePushQueryMetrics> scalablePushQueryMetrics, final PushRoutingOptions pushRoutingOptions, final String thisHostName) {
VertxUtils.checkContext(pushPhysicalPlanManager.getContext());
if (pushConnectionsHandle.isClosed()) {
return;
}
final Set<KsqlNode> updatedHosts = registryToNodes.apply(pushPhysicalPlanManager.getScalablePushRegistry());
final Set<KsqlNode> hosts = pushConnectionsHandle.getActiveHosts();
final Set<KsqlNode> newHosts = Sets.difference(updatedHosts, hosts).stream().filter(node -> pushConnectionsHandle.get(node).map(routingResult -> routingResult.getStatus() != RoutingResultStatus.IN_PROGRESS).orElse(true)).collect(Collectors.toSet());
final Set<KsqlNode> removedHosts = Sets.difference(hosts, updatedHosts);
if (newHosts.size() > 0) {
LOG.info("Dynamically adding new hosts {} for {}", newHosts, pushPhysicalPlanManager.getQueryId());
final Set<KsqlNode> catchupHosts = newHosts.stream().filter(node -> pushConnectionsHandle.get(node).map(routingResult -> routingResult.getStatus() == RoutingResultStatus.OFFSET_GAP_FOUND).orElse(false)).collect(Collectors.toSet());
connectToHosts(serviceContext, pushPhysicalPlanManager, statement, newHosts, outputSchema, transientQueryQueue, pushConnectionsHandle, true, scalablePushQueryMetrics, catchupHosts, pushRoutingOptions, thisHostName);
}
if (removedHosts.size() > 0) {
LOG.info("Dynamically removing hosts {} for {}", removedHosts, pushPhysicalPlanManager.getQueryId());
for (final KsqlNode node : removedHosts) {
final RoutingResult result = pushConnectionsHandle.remove(node);
result.close();
result.updateStatus(RoutingResultStatus.REMOVED);
}
}
pushPhysicalPlanManager.getContext().owner().setTimer(clusterCheckInterval, timerId -> checkForNewHosts(serviceContext, pushPhysicalPlanManager, statement, outputSchema, transientQueryQueue, pushConnectionsHandle, scalablePushQueryMetrics, pushRoutingOptions, thisHostName));
}
use of io.confluent.ksql.physical.scalablepush.locator.PushLocator.KsqlNode in project ksql by confluentinc.
the class AllHostsLocatorTest method shouldLocate.
@Test
public void shouldLocate() throws MalformedURLException {
// Given:
final AllHostsLocator locator = new AllHostsLocator(() -> ImmutableList.of(metadata1, metadata2), new URL("http://localhost:8088"));
when(metadata1.getAllStreamsHostMetadata()).thenReturn(ImmutableList.of(streamsMetadata1, streamsMetadata2));
when(metadata2.getAllStreamsHostMetadata()).thenReturn(ImmutableList.of(streamsMetadata3));
when(streamsMetadata1.hostInfo()).thenReturn(new HostInfo("abc", 101), new HostInfo("localhost", 8088));
when(streamsMetadata2.hostInfo()).thenReturn(new HostInfo("localhost", 8088));
when(streamsMetadata3.hostInfo()).thenReturn(new HostInfo("localhost", 8089));
// When:
final List<KsqlNode> nodes = ImmutableList.copyOf(locator.locate());
// Then:
assertThat(nodes.size(), is(3));
assertThat(nodes.get(0).isLocal(), is(false));
assertThat(nodes.get(0).location().toString(), is("http://abc:101/"));
assertThat(nodes.get(1).isLocal(), is(true));
assertThat(nodes.get(1).location().toString(), is("http://localhost:8088/"));
assertThat(nodes.get(2).isLocal(), is(false));
assertThat(nodes.get(2).location().toString(), is("http://localhost:8089/"));
}
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