zhuzhurk commented on a change in pull request #9113: [FLINK-13222] [runtime]
Add documentation for failover strategy option
URL: https://github.com/apache/flink/pull/9113#discussion_r305322763
##########
File path:
flink-core/src/main/java/org/apache/flink/configuration/JobManagerOptions.java
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@@ -105,18 +105,27 @@
/**
* This option specifies the failover strategy, i.e. how the job
computation recovers from task failures.
+ * The option "individual" and "region-legacy" are intentionally not
included
+ * as they have some known limitations or issues.
+ * "individual" strategy only works when all tasks are not connected,
in which case the "region"
+ * failover strategy would also restart failed tasks individually.
+ * "region-legacy" strategy is not able to backtrack missing input
result partitions.
+ * The new "region" strategy supersedes "individual" and
"region-legacy" strategies and should always work.
*/
- @Documentation.ExcludeFromDocumentation("The failover strategy feature
is highly experimental.")
public static final ConfigOption<String> EXECUTION_FAILOVER_STRATEGY =
key("jobmanager.execution.failover-strategy")
.defaultValue("full")
.withDescription(Description.builder()
.text("This option specifies how the job
computation recovers from task failures. " +
"Accepted values are:")
.list(
- text("'full': Restarts all tasks."),
- text("'individual': Restarts only the
failed task. Should only be used if all tasks are independent components."),
- text("'region': Restarts all tasks that
could be affected by the task failure.")
+ text("'full': Restarts all tasks to
recover the job."),
+ text("'region': Restarts all tasks that
could be affected by the task failure. " +
Review comment:
Ok. Let's make it this way.
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