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https://issues.apache.org/jira/browse/HIVE-24068?focusedWorklogId=474185&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-474185
]
ASF GitHub Bot logged work on HIVE-24068:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 25/Aug/20 07:58
Start Date: 25/Aug/20 07:58
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on a change in pull request #1428:
URL: https://github.com/apache/hive/pull/1428#discussion_r476242856
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/reexec/ReExecutionDagSubmitPlugin.java
##########
@@ -0,0 +1,86 @@
+/*
+ * 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.hadoop.hive.ql.reexec;
+
+import org.apache.hadoop.hive.ql.Driver;
+import org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext;
+import org.apache.hadoop.hive.ql.hooks.HookContext;
+import org.apache.hadoop.hive.ql.hooks.HookContext.HookType;
+import org.apache.hadoop.hive.ql.plan.mapper.PlanMapper;
+import org.apache.hadoop.hive.ql.processors.CommandProcessorException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Re-Executes a query when DAG submission fails after get session returned
successfully.
+ */
+public class ReExecutionDagSubmitPlugin implements IReExecutionPlugin {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(ReExecutionDagSubmitPlugin.class);
+ class LocalHook implements ExecuteWithHookContext {
+
+ @Override
+ public void run(HookContext hookContext) throws Exception {
+ if (hookContext.getHookType() == HookType.ON_FAILURE_HOOK) {
+ Throwable exception = hookContext.getException();
+ if (exception != null) {
+ if (exception.getMessage() != null) {
+ // there could be race condition where getSession could return a
healthy AM but by the time DAG is submitted
+ // the AM could become unhealthy/unreachable (possible DNS or
network issues) which can fail tez DAG
+ // submission. Since the DAG hasn't started execution yet this
failure can be safely restarted.
Review comment:
I think this explanation could be moved into the class documentation
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Issue Time Tracking
-------------------
Worklog Id: (was: 474185)
Time Spent: 20m (was: 10m)
> Add re-execution plugin for handling DAG submission failures
> ------------------------------------------------------------
>
> Key: HIVE-24068
> URL: https://issues.apache.org/jira/browse/HIVE-24068
> Project: Hive
> Issue Type: Bug
> Affects Versions: 4.0.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> DAG submission failure can also happen in environments where AM container
> died causing DNS issues. DAG submissions are safe to retry as the DAG hasn't
> started execution yet. There are retries at getSession and submitDAG level
> individually but some submitDAG failure has to retry getSession as well as AM
> could be unreachable, this can be handled in re-execution plugin.
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