SAP gateway connection failed

Question

Hi All,
Due to restructure in DMZ in our network, IP addr of our R3 server is changed from 172.20.x.x to 192.168.x.x. and the original IP is NATted for connections. We can able to access SAPGUI, but RFCs from this server to other systems is not working. We are not able to remote logon from RFC to this R3 system from other servers, because of same issue.
RFC Error:
Error Details     LOCATION: SAP-Gateway on host <sapr3> / sapgw01
Error Details     DETAIL: no connect of TP sapdp00 from host <sapbw> after 20 sec
As per the note, Note 148832 - IP address conversion with a firewall, we have added the BW system entry in gw/alternative_hostnames, still its not working.
Because of this issue we are not able to access this R3 server from BW
as source system check failing with error
The following errors occurred in source system RSAR 374
Result of the destination check. Error when opening destination connection RSAR 375
*devrd file:*_
gateway runs with dp version 241000(ext=110000) (@(#) DPLIB-INT-VERSION-241000-UC)
gateway (version=700.2008.06.23)
gw/local_addr : 0.0.0.0
Bind service sapgw01 (socket) to port 3301
GwPrintMyHostAddr: my host addresses are :
  1 : [192.168.x.x] <sapr3> (HOSTNAME)
  2 : [127.0.0.1] localhost (LOCALHOST)
  3 : [172.20.x.x] alternative (ALTERNATIVE)
  4 : [172.20.y.y] <sapbw> (ALTERNATIVE)
Full qualified hostname = <sapr3>
DpSysAdmExtCreate: ABAP is active
DpSysAdmExtCreate: VMC (JAVA VM in WP) is not active
Thu Dec  3 10:59:47 2009
ERROR => GwRqDpSendTo: no comm_adm entry found (gw=<sapbw> / sapdp00, rq=203, idx=12, conv=27032592, uid=1143, mode=0 [gwdp
LOCATION    SAP-Gateway on host <sapr3> / sapgw01
ERROR       COMM_TBL table error
TIME        Thu Dec  3 10:59:47 2009
RELEASE     700
COMPONENT   SAP-Gateway
VERSION     2
RC          235
MODULE      gwdp.c
LINE        6065
COUNTER     715
Thu Dec  3 12:30:15 2009
ERROR => GwHdlRqFromSapWp: no comm_adm entry found [gwdp.c       1427]
ERROR =>   (rq/idx/conv/tid/uid/mode/wp=10/0/37803973/21/1300/0/1) [gwdp.c       1436]
Please let us know what to do to resolve the RFC error
Thanks,
Ramesh

Answer 1

Following will list increased trace :
NiSelISelectInt: 1 handles selected (0 buffered)
main: NiSelNext (ni_hdl=10, read=1, write=0, connect=0, hdl_info=0x100b50b40)
request from R3_WORKPROCESS
NiIRead: hdl 10 received data (rcd=28,pac=2,MESG_IO)
GwReadSapWpRq: request: request from sap wp 1
-IN- tid         32            uid  1283         mode  0
-IN- appc_ca_blk 7             len  1697         rq_id 0
-IN- wait_f_answ 1             cmd  0
GwReadSapWpRq2: wp 1 waits for data
Adresse   Offset  Appc-Data to Gateway
0xffffffff73966230  000000  06ca0200 0503ffff 00000100 00000000 |................|
0xffffffff73966240  000016  40ffffff ff000000 00000000 00008704 |@...............|
0xffffffff73966250  000032  00000000 00000000 00000000 00000000 |................|
0xffffffff73966260  000048  54443143 4c4e5430 3137322e 32302e34 |TD1CLNT0172.20.4|
0xffffffff73966270  000064  73617064 70303020 49020000 0004ffff |sapdp00 I.......|
DpGetCpicCommIdx: found index 4 via appc_hdr
found comm entry 4 (tid/uid/mode/conv_id/a_r: 32/1283/0/        /0)
GwInitLocCommAdmEntry: init gw_comm_adm entry 4
GwListRemove: elem 4 not in comm_write_list
GwListRemove: elem 4 not in comm_wait_list
GwInitLocCommAdmEntry: 0 waiting writes to rem gw
GwSearch: connect to myself
GwFoundSysAddr: found addr
GwFoundWaitingAddr: found addr
GwSendToRemGw: request for myself (len=1697)
GwGetMemory: allocated 0x100ceb140 (len=1885)
GwGetMemory: act_overflow_size = 1885 (+ 1885)
REL APPC ca_blk 7
GwSendToRemGw: comp req = adr/total/alloc/hdr/param_hdr/data 0x100ceb140/1885/1885/80/295/1322
IN:
ReqType     : CPIC         SysIdx  : 0      ReqLen  : 1402   ReqId   : 8752
CommIdx     : 4            ConnIdx : -1     ReqVer  : 6      Trace   : 0
conn        : -1           wp_no   : -1     ReqBlk  : -1
RqType      : SAP_INIT     Prot    : INT    UID     : 1283   Mode    : 0
User        :              SapRc   : 0      AppcRc  : 0      ConvId  :
Vector      : F_V_SEND_DATA
Info        : SYNC_CPIC_FUNCTION WITH_HOSTADDR WITH_GW_SAP_PARAMS_HDR R3_CPIC_LOGIN_WITH_TERM
Info2       : WITH_LONG_LU_NAME
Info3       : GW_EXTENDED_INIT_OPTIONS
Addr (IPv4) : 172.20.48.162
LU          : 172.20.4     TP      : sapdp00  CType   : I    Cli Info: R3_CLIENT
Sec Usr     :              SecUsrLn: 0        Sec Type: 0
Send Length : 1322
long TP     : sapdp00
long LU     : 172.20.48.162
Address
Offset
CPIC-Data
x00ceb200
000000
d9c6c3f0 f0f0f0f0 f0f0f0f0 01010008
x00ceb210
000016
01020101 01010000 01010103 00040000
x00ceb220
000032
020b0103 0106000b 04010002 01030200
x00ceb230
000048
00002301 06010500 b5312d31 332d322d
..#......1-13-2-
GwUpdConvStatistik: conv_no/tcp_conv_no/sna_conv_no: 2/2/0
GwGetConnEntry: found conn 6 in free list
GwListRemove: remove elem 6 from conn_free_list
GwListRemove: 498 elems in conn_free_list
GwListInsert: insert elem 6 into conn_inuse_list (at end)
GwListInsert: 2 elems in conn_inuse_list
GwIHandleRq: new conn_tbl index: 6
GwIHandleRq: increment conv_no of client 0: 2
GwIHandleRq: own_index: 0
GwIHandleRq: set act rq type SAP_INIT
R3INIT(6, cpic_vector=1)
R3INIT: sys index = 0
GwMkTimeStamp: create conversation id 31510798
GwFiCreateConvId: created 31510798
R3INIT: generated Partner-Host-Addr: 172.20.48.162
R3INIT: received extended init options
  timeout = -2
  keepalive_timeout = -2
  export_trace = 2
  start_type = 0
  net_protocol = 0
  local_addr = ::
R3INIT: use extended init options
  timeout = 20
  keepalive_timeout = 300
  export_trace = 0
  start_type = 1
  start cmd  = /bin/rsh
  net_protocol = 0
  local_addr = ::
GwBufInit: initialize buffer info for conn 6
R3ALLC(31510798, cpic_vector=1, ..)
I am the client (0)
GwISearchSystem: check new tp >sapgw00<
GwFoundSysAddr: found addr
GwListInsert: insert elem 6 into conn_search_list (at begin)
GwListInsert: 1 elems in conn_search_list
GwISendConnReq: TP: >sapdp00<
GwISendConnReq: try to connect to service sapgw00
GwGetFreeSysid: sys 178 free
GwIAllocMemForLU_TP: 468 bytes for sys 178 allocated
GwListRemove: remove elem 178 from sys_free_list
GwListRemove: 289 elems in sys_free_list
GwListInsert: insert elem 178 into sys_inuse_list (at begin)
GwListInsert: 11 elems in sys_inuse_list
GwISendConnReq: server_idx/act_sys: 178/11
GwInsertSysAddr: inserted sys addr = 172.20.48.162 (1)
GwListInsert: insert elem 178 into sys_r3_list (at begin)
GwListInsert: 2 elems in sys_r3_list
NiHsLGetHostName: found address 172.20.48.162 in cache
NiIGetHostName: addr 172.20.48.162 = hostname '<sapbw>'
GwIAsyncConn: connect to gateway <sapbw> / sapgw00
NiHsLGetNodeAddr: found hostname '<sapbw>' in cache
NiIGetNodeAddr: hostname '<sapbw>' = addr 172.20.48.162
NiHsLGetServNo: found service name 'sapgw00' in cache
NiIGetServNo: servicename 'sapgw00' = port 0C.E4/3300
NiICreateHandle: hdl 28 state NI_INITIAL
NiIInitSocket: set default settings for new hdl 28 / sock 40 (I4; ST)
NiIBlockMode: set blockmode for hdl 28 FALSE
NiIConnectSocket: connection of hdl 28 to 172.20.48.162:3300 in progress (timeout=0)
NiIConnect: hdl 28 took local address 192.168.16.25:53031
NiIConnect: state of hdl 28 NI_CONN_WAIT
GwIConnectWithRemGw: timeout during GwIAsyncConn
GwSaveExtInfo: 0x100cec250 for ext info (496 bytes)
GwSelSet: set RW- (0x100b51050) for hdl 28
GwReadReqIndex: (process_id: -1)
GwReadReqIndex: no filled request-index-block
GwCheckClient: check clients
GwCheckClient: actual time stamp is 343038983
GwCheckClient: start_of_waiting stamp = 342822381
GwCheckClient: 1 clients still waiting for answers
GwCheckPollValue()
GwCheckPollValue: waiting client(s) (GW_COMM_CLIENTS_WAITING)
GWRD LOOP **********
I'm in GwReceive
Fri Dec  4 12:02:42 2009
NiSelISelectInt: 0 handles selected (0 buffered)
GwIRegSchedule()
GwICheckConv()
GwICheckConv: check conn 6
R3ALLC(31510798, cpic_vector=1, ..)
GwISearchSystem: connection to server 172.20.48.162 / sapdp00 in state CONN_PENDING
GwCheckCounter: check counter
GwCheckPollValue()
GwCheckPollValue: waiting client(s) (GW_COMM_CLIENTS_WAITING)
GwReadReqIndex: (process_id: -1)
GwReadReqIndex: no filled request-index-block
GwCheckClient: check clients
GwCheckClient: actual time stamp is 343543140
GwCheckClient: start_of_waiting stamp = 342822381
LOCK APPC ca_blk 7
GwCheckClient: timeout, rq/uid/mode/conv ID/comm_idx: 203/1282/0/17621698/13
GwSendRcToDp: send appc_rc/sap_rc 10001/221 to dp
GwIsAWaitingSWP: wp 0 waiting
GwSapWpWakeUp: send answer to sap wp 0
GwSapWpWakeUp: make wp 0 owner of appc_ca_blk 7
-OUT- tid         -1            uid  -1           mode  255
-OUT- appc_ca_blk 7             len  80           rq_id 12639
-OUT- wait_f_answ 0             cmd  0
NiIWrite: hdl 9 sent data (wrt=28,pac=1,MESG_IO)
GwListRemove: remove elem 13 from comm_wait_list
GwListRemove: 0 elems in comm_wait_list
GwCheckClient: no more clients waiting for answers