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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2021/01/19 01:32:35 UTC
[GitHub] [flink] zentol commented on a change in pull request #14678: [FLINK-20833][runtime] Add pluggable failure listener in job manager
zentol commented on a change in pull request #14678:
URL: https://github.com/apache/flink/pull/14678#discussion_r559859082
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListener.java
##########
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.core.plugin.Plugin;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+/** Failure listener to customize the behavior for each type of failures tracked in job manager. */
+public interface FailureListener extends Plugin {
+
+ /**
+ * Initialize the listener with JobManagerJobMetricGroup.
+ *
+ * @param metricGroup metrics group that the listener can add customized metrics definition.
+ */
+ void init(JobManagerJobMetricGroup metricGroup);
Review comment:
`JobManagerJobMetricGroup` is an internal API that should not be exposed to user-code. Use `MetricGroup` instead.
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListener.java
##########
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.core.plugin.Plugin;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+/** Failure listener to customize the behavior for each type of failures tracked in job manager. */
+public interface FailureListener extends Plugin {
+
+ /**
+ * Initialize the listener with JobManagerJobMetricGroup.
+ *
+ * @param metricGroup metrics group that the listener can add customized metrics definition.
+ */
+ void init(JobManagerJobMetricGroup metricGroup);
+
+ /**
+ * Method to handle a failure in the listener.
+ *
+ * @param cause the failure cause
+ * @param globalFailure whether the failure is a global failure
+ */
+ void onFailure(final Throwable cause, boolean globalFailure);
Review comment:
Shouldn't this also receive some information about the job? Given that the listener is configured per cluster, how would an implementation distinguish errors between different jobs within a session cluster?
I think it would be good to out-line the use-case that you're trying to accomplish; as it stands, outside of counting exceptions there's little you can do with the current interface.
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListenerFactory.java
##########
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.core.plugin.PluginManager;
+import org.apache.flink.core.plugin.PluginUtils;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/** Factory class for creating {@link FailureListener} with plugin Manager. */
+public class FailureListenerFactory {
Review comment:
Seems like a misnomer to call this a factory. You could replace this entire class with a static method that returns a collection of listeners.
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListener.java
##########
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.core.plugin.Plugin;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+/** Failure listener to customize the behavior for each type of failures tracked in job manager. */
+public interface FailureListener extends Plugin {
+
+ /**
+ * Initialize the listener with JobManagerJobMetricGroup.
+ *
+ * @param metricGroup metrics group that the listener can add customized metrics definition.
+ */
+ void init(JobManagerJobMetricGroup metricGroup);
+
+ /**
+ * Method to handle a failure in the listener.
+ *
+ * @param cause the failure cause
+ * @param globalFailure whether the failure is a global failure
Review comment:
This needs better documentation or additional guidance on what constitutes a global failure.
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListenerFactory.java
##########
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.core.plugin.PluginManager;
+import org.apache.flink.core.plugin.PluginUtils;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/** Factory class for creating {@link FailureListener} with plugin Manager. */
+public class FailureListenerFactory {
+ private final PluginManager pluginManager;
+ private List<FailureListener> failureListeners = new ArrayList<>();
Review comment:
why is this not `final`?
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListenerFactory.java
##########
@@ -0,0 +1,50 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.core.plugin.PluginManager;
+import org.apache.flink.core.plugin.PluginUtils;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+
+/** Factory class for creating {@link FailureListener} with plugin Manager. */
+public class FailureListenerFactory {
+ private final PluginManager pluginManager;
Review comment:
What are we keeping this reference for?
##########
File path: flink-runtime/src/main/java/org/apache/flink/runtime/executiongraph/FailureListener.java
##########
@@ -0,0 +1,40 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.flink.runtime.executiongraph;
+
+import org.apache.flink.core.plugin.Plugin;
+import org.apache.flink.runtime.metrics.groups.JobManagerJobMetricGroup;
+
+/** Failure listener to customize the behavior for each type of failures tracked in job manager. */
+public interface FailureListener extends Plugin {
Review comment:
I would recommend having a factory implement the Plugin interface. This allows implementations to be much more flexible structurally.
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