Hi,
I've gone through the dispatcher trace log.
There are two patterns for Q04 system log as below:
pattern 1:
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DpRTmPrepareReq: network error of client T140_U5606, NiBufReceive (-6: NIECONN_BROKEN), dp_tm_status=DP_LOGGED_IN
DpRTmPrepareReq: client address of T140_U5606 is 172.20.4.214(172.20.4.214)
***LOG Q04=> DpRTmPrep, NiBufReceive (5606 CA 140 LSW72120) [dpTerminal.c 714]
????
DpHdlSoftCancel: delete in progress for T140_U5606_M0, ignore cancel request from DISP (reason=DP_SOFTCANCEL_NO_REASON)
----------------
pattern 2:
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***LOG Q0I=> NiIRead: P=172.21.130.252:56234; L=172.20.1.13:3220: recv (10054: WSAECONNRESET: Connection reset by peer) [D:/depot/bas/742_REL/src/base/ni/nixxi.cpp 5386]
*** ERROR => NiIRead: SiRecv failed for hdl 815/sock 1612
(SI_ECONN_BROKEN/10054; I4; ST; P=172.21.130.252:56234; L=172.20.1.13:3220) [nixxi.cpp 5386]
DpRTmPrepareReq: network error of client T119_U5779, NiBufReceive (-6: NIECONN_BROKEN), dp_tm_status=DP_LOGGED_IN
DpRTmPrepareReq: client address of T119_U5779 is 172.21.130.252(172.21.130.252)
***LOG Q04=> DpRTmPrep, NiBufReceive (5779 JPA 119 <terminal host>) [dpTerminal.c 714]
|GUI |T119_U5779_M0 |400|JPA |<terminal host> |05:20:49|14 |SAPMSYST |high| | | |417
DpHdlSoftCancel: cancel request for T119_U5779_M0 received from DISP (reason=DP_SOFTCANCEL_NO_REASON)
----------------
As I mentioned before, both of the two patterns indicate network issue.
you can also reproduce this error by just killing the SAPGUI on frontend PC...
you can check 21971 sap note for more info.
21971 - Connection between SAP GUI and application server terminated
please involve your network admin to solve the network issue.
Thanks and best regards,
Shi