bharathv commented on a change in pull request #812: HBASE-23275: Track active
master's address in ActiveMasterManager
URL: https://github.com/apache/hbase/pull/812#discussion_r345321375
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/master/ActiveMasterManager.java
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@@ -106,6 +112,33 @@ void handle(final String path) {
}
}
+ /*
+ * Fetches the active master's ServerName from zookeeper.
+ */
+ private void fetchAndSetActiveMasterServerName() {
+ LOG.debug("Attempting to fetch active master sn from zk");
+ try {
+
activeMasterServerName.set(MasterAddressTracker.getMasterAddress(watcher));
+ } catch (IOException | KeeperException e) {
+ // Log and ignore for now and re-fetch later if needed.
+ LOG.error("Error fetching active master information", e);
+ }
+ }
+
+ public ServerName getActiveMasterServerName() {
+ if (!clusterHasActiveMaster.get()) {
+ return null;
+ }
+ ServerName sname = activeMasterServerName.get();
+ if (sname != null) {
+ return sname;
+ }
+ // This happens if the data was not fetched earlier for some reason.
+ fetchAndSetActiveMasterServerName();
+ // It could still be null, but return whatever we have.
Review comment:
Sure.
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