aib628 commented on a change in pull request #4186:
URL: https://github.com/apache/zeppelin/pull/4186#discussion_r685807805
##########
File path:
zeppelin-server/src/main/java/org/apache/zeppelin/socket/NotebookServer.java
##########
@@ -263,19 +263,17 @@ public void onMessage(NotebookSocket conn, String msg) {
}
TicketContainer.Entry ticketEntry =
TicketContainer.instance.getTicketEntry(receivedMessage.principal);
- if (ticketEntry != null &&
- (!ticketEntry.getTicket().equals(receivedMessage.ticket))) {
+ if (ticketEntry == null || StringUtils.isEmpty(ticketEntry.getTicket()))
{
+ LOG.debug("{} message: invalid ticket {}", receivedMessage.op,
receivedMessage.ticket);
+ return;
+ } else if (!ticketEntry.getTicket().equals(receivedMessage.ticket)) {
/* not to pollute logs, log instead of exception */
if (StringUtils.isEmpty(receivedMessage.ticket)) {
- LOG.debug("{} message: invalid ticket {} != {}", receivedMessage.op,
- receivedMessage.ticket, ticketEntry.getTicket());
- } else {
- if (!receivedMessage.op.equals(OP.PING)) {
- conn.send(serializeMessage(new
Message(OP.SESSION_LOGOUT).put("info",
- "Your ticket is invalid possibly due to server restart. "
- + "Please login again.")));
- }
+ LOG.debug("{} message: invalid ticket {} != {}", receivedMessage.op,
receivedMessage.ticket, ticketEntry.getTicket());
Review comment:
Yeah, i'm with you on that. But it appears, as shown in the screenshot,
so we log it and fast return, other than execute downstram logic, and then
resulting in NPE.
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