Github user selvaganesang commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/1209#discussion_r136247933
--- Diff:
dcs/src/main/java/org/trafodion/dcs/master/listener/ListenerWorker.java ---
@@ -86,39 +86,43 @@ public void run() {
DataEvent dataEvent;
while(true) {
- // Wait for data to become available
- synchronized(queue) {
- while(queue.isEmpty()) {
- try {
- queue.wait();
- } catch (InterruptedException e) {
+ try {
+ // Wait for data to become available
+ synchronized(queue) {
+ while(queue.isEmpty()) {
+ try {
+ queue.wait();
+ } catch (InterruptedException e) {
+ }
}
+ dataEvent = queue.remove(0);
}
- dataEvent = queue.remove(0);
- }
- SelectionKey key = dataEvent.key;
- SocketChannel client = (SocketChannel) key.channel();
- Socket s = client.socket();
- ClientData clientData = (ClientData) key.attachment();
- ListenerService server = dataEvent.server;
- dataEvent.key = null;
- dataEvent.server = null;
-
- switch (clientData.hdr.getOperationId()){
- case ListenerConstants.DCS_MASTER_GETSRVRAVAILABLE:
- clientData =
requestGetObjectRef.processRequest(clientData, s);
- break;
- case ListenerConstants.DCS_MASTER_CANCELQUERY:
- clientData =
requestCancelQuery.processRequest(clientData, s);
- break;
- default:
- clientData = requestUnknown.processRequest(clientData,
s);
- break;
+ SelectionKey key = dataEvent.key;
+ SocketChannel client = (SocketChannel) key.channel();
+ Socket s = client.socket();
+ ClientData clientData = (ClientData) key.attachment();
+ ListenerService server = dataEvent.server;
+ dataEvent.key = null;
+ dataEvent.server = null;
+
+ switch (clientData.hdr.getOperationId()){
+ case ListenerConstants.DCS_MASTER_GETSRVRAVAILABLE:
+ clientData =
requestGetObjectRef.processRequest(clientData, s);
+ break;
+ case ListenerConstants.DCS_MASTER_CANCELQUERY:
+ clientData =
requestCancelQuery.processRequest(clientData, s);
+ break;
+ default:
+ clientData =
requestUnknown.processRequest(clientData, s);
+ break;
+ }
+ // Return to sender
+ int requestReply = clientData.requestReply;
+ key.attach(clientData);
+ server.send(new PendingRequest(key, requestReply));
+ } catch (Exception e){
+ LOG.error("Unexpected Exception", e);
--- End diff --
You need to handle only the exceptions that can be ignored and possibly
have a mechanism to allow certain number of retries only. , By handling the
generic exception, you would ignore the runtime exceptions like null pointer
exceptions etc. This can mask the real issues that could remain unnoticed for
long time.
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at [email protected] or file a JIRA ticket
with INFRA.
---
