EMS Java client reports: " TCPLink Error: invalid magic in the message and got deadlock".
Article ID: KB0093649
Updated On:
| Products | Versions |
|---|---|
| TIBCO Enterprise Message Service | - |
| Not Applicable | - |
Description
EMS Java client reports: " TCPLink Error: invalid magic in the message and got deadlock".
Symptoms:
Cause:
This is a known defect known defect and has been fixed since EMS 8.0 Java client.
8.0.0 EMS-3897
Fixed an error that caused an application's connection to be unusable—and show as stopped in the tibemsadmin tool—if the client library tried to connect to a non-EMS server process that was incorrectly part of the FT URL list.
The "unusable" mentioned here means deadlock.
The thread dump taken from the java client is like following:
=============
"TIBCO
EMS TCPLink Reader (Server-58672344)" daemon prio=10
tid=0x00007fe251367000 nid=0x3063 waiting for monitor entry
[0x00007fe2995e9000]
java.lang.Thread.State: BLOCKED (on object monitor)
at com.tibco.tibjms.TibjmsxSessionImp._close(TibjmsxSessionImp.java:2576)
- waiting to lock <0x00000000c3939888> (a java.lang.Object)
at com.tibco.tibjms.TibjmsConnection._close(TibjmsConnection.java:2183)
at com.tibco.tibjms.TibjmsConnection._onDisconnected(TibjmsConnection.java:2284)
at com.tibco.tibjms.TibjmsConnection$ServerLinkEventHandler.onEventDisconnected(TibjmsConnection.java:341)
at com.tibco.tibjms.TibjmsxLinkTcp._readWireMsg(TibjmsxLinkTcp.java:700)
at com.tibco.tibjms.TibjmsxLinkSSL._readWireMsg(TibjmsxLinkSSL.java:651)
at com.tibco.tibjms.TibjmsxLinkTcp.syncSendRequest(TibjmsxLinkTcp.java:1078)
at com.tibco.tibjms.TibjmsConnection._doInitMsg(TibjmsConnection.java:1699)
at com.tibco.tibjms.TibjmsConnection._doInitMsg(TibjmsConnection.java:1447)
at com.tibco.tibjms.TibjmsConnection._reconnect(TibjmsConnection.java:1868)
at com.tibco.tibjms.TibjmsConnection$ServerLinkEventHandler.onEventReconnect(TibjmsConnection.java:361)
at com.tibco.tibjms.TibjmsxLinkTcp._doReconnect(TibjmsxLinkTcp.java:590)
at com.tibco.tibjms.TibjmsxLinkTcp$LinkReader.work(TibjmsxLinkTcp.java:307)
- locked <0x00000000c1aa2d90> (a java.lang.Object)
at com.tibco.tibjms.TibjmsxLinkTcp$LinkReader.run(TibjmsxLinkTcp.java:247)
==================
The
client may report " TCPLink Error: invalid magic in the message"
error. It may be possible there was some other daemon or service running using a EMS
server port where the client
tried to reconnect to.
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