KeeProMise commented on code in PR #5991:
URL: https://github.com/apache/hadoop/pull/5991#discussion_r1308085818
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hadoop-hdfs-project/hadoop-hdfs-rbf/src/test/java/org/apache/hadoop/hdfs/server/federation/router/TestRouterClientRejectOverload.java:
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@@ -357,6 +363,83 @@ public void testNoNamenodesAvailable() throws Exception{
assertEquals(originalRouter0Failures, rpcMetrics0.getProxyOpNoNamenodes());
}
+ /**
+ * When failover occurs, the router may record that the ns has no active
namenode.
+ * Only when the router updates the cache next time can the memory status be
updated,
+ * causing the router to report NoNamenodesAvailableException for a long
time.
+ */
+ @Test
+ public void testNoNamenodesAvailableLongTimeWhenNsFailover() throws
Exception {
+ setupCluster(false, true);
+ transitionClusterNSToStandby(cluster);
+ for (RouterContext routerContext : cluster.getRouters()) {
+ // Manually trigger the heartbeat
+ Collection<NamenodeHeartbeatService> heartbeatServices = routerContext
+ .getRouter().getNamenodeHeartbeatServices();
+ for (NamenodeHeartbeatService service : heartbeatServices) {
+ service.periodicInvoke();
+ }
+ // Update service cache
+ routerContext.getRouter().getStateStore().refreshCaches(true);
+ }
+ // Record the time after the router first updated the cache
+ long firstLoadTime = Time.now();
+ List<MiniRouterDFSCluster.NamenodeContext> namenodes =
cluster.getNamenodes();
+
+ // Make sure all namenodes are in standby state
+ for (MiniRouterDFSCluster.NamenodeContext namenodeContext : namenodes) {
+ assertEquals(STANDBY.ordinal(),
Review Comment:
yes, done in pr #5990
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