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https://issues.apache.org/jira/browse/HDFS-16844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17635024#comment-17635024
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ASF GitHub Bot commented on HDFS-16844:
---------------------------------------
omalley commented on code in PR #5138:
URL: https://github.com/apache/hadoop/pull/5138#discussion_r1024567351
##########
hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/store/records/TestRouterState.java:
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@@ -82,4 +96,141 @@ public void testSerialization() throws IOException {
validateRecord(newRecord);
}
+
+ /**
+ * A mock StateStoreDriver that runs in memory and can cause errors.
+ */
+ public static class MockStateStoreDriver extends StateStoreBaseImpl {
Review Comment:
Done.
> [RBF] The routers should be resiliant against exceptions from StateStore
> ------------------------------------------------------------------------
>
> Key: HDFS-16844
> URL: https://issues.apache.org/jira/browse/HDFS-16844
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: rbf
> Affects Versions: 3.3.4
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Priority: Major
> Labels: pull-request-available
>
> Currently, a single exception from the StateStore will cripple a router by
> clearing the caches before the replacement is loaded. Since the routers have
> the information in an in-memory cache, it is better to keep running. There is
> still the timeout that will push the router into safe-mode if it can't load
> the state store over a longer period of time.
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