bbeaudreault commented on code in PR #5774: URL: https://github.com/apache/hbase/pull/5774#discussion_r1539000878
########## hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java: ########## @@ -324,8 +324,23 @@ public void regionServerReport(ServerName sn, ServerMetrics sl) throws YouAreDea // the ServerName to use. Here we presume a master has already done // that so we'll press on with whatever it gave us for ServerName. if (!checkAndRecordNewServer(sn, sl)) { - LOG.info("RegionServerReport ignored, could not record the server: " + sn); - return; // Not recorded, so no need to move on + // Master already registered server with same (host + port) and higher startcode. + // This can happen if regionserver report comes late from old server + // (possible race condition), by that time master has already processed SCP for that + // server and started accepting regionserver report from new server i.e. server with + // same (host + port) and higher startcode. + // The exception thrown here is not meant to tell the region server it is dead because if + // there is a new server on the same host port, the old server should have already been + // dead in ideal situation. + // The exception thrown here is to skip the later steps of the whole regionServerReport + // request processing. Usually, after recording it in ServerManager, we will call the + // related methods in AssignmentManager to record region states. If the region server + // is already dead, we should not do these steps anymore, so here we throw an exception + // to let the upper layer know that they should not continue processing anymore. + final String errorMsg = "RegionServerReport ignored, could not record the server: " + sn + + " . Consider yourself dead as server with higher startcode is already registered."; Review Comment: I think the comment is clear. To me the log message needs to change -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@hbase.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org