Dear,
Sap web-dispatcher is not connecting to back-end system, it showing the below error.
ERROR => Read info from PRD message server sapprdcluster.awqaf.gov.kw failed: HTTP code 404, see also SAP note 1528396
dev_webdisp log:
---------------------------------------------------
trc file: "dev_webdisp", trc level: 1, release: "745"
---------------------------------------------------
sysno 00
sid WDA
systemid 562 (PC with Windows NT)
relno 7450
patchlevel 0
patchno 14
intno 20151301
make multithreaded, Unicode, 64 bit, optimized
profile F:\usr\sap\WDA\SYS\profile\WDA_W00_AWQ-WEBDISP1
pid 3048
[Thr 572] Thu Jan 07 09:10:36 2016
[Thr 572] started security log to file ./dev_icm_sec
[Thr 572] SAP Web Dispatcher running on: AWQ-WEBDISP1.awqaf.gov.kw
[Thr 572] MtxInit: 30001 0 2
[Thr 572] ***LOG IM1=> IcmInit, Startup (SAP Web Dispatcher&AWQ-WEBDISP1.awqaf.gov.kw&3048&) [icxxman.c 1966]
[Thr 572] IcmInit: listening to admin port: 65000
[Thr 572] MPI: dynamic quotas disabled.
[Thr 572] MPI init: pipes=4000 buffers=2718 reserved=815 quota=10%
[Thr 572] CCMS: SemInMgt: Semaphore Management initialized by AlAttachShm_Ext.
[Thr 572] CCMS: SemInit: Semaphore 38 initialized by AlAttachShm_Ext.
[Thr 572] IcrIAddSingleSystem: Added backend system: SID=JPR, MSHOST=sapprtlclus.awqaf.gov.kw, MSPORT=8100
[Thr 572] IcrIAddSingleSystem: Added backend system: SID=PRD, MSHOST=sapprdcluster.awqaf.gov.kw, MSPORT=8100
[Thr 572] *** ERROR => ERROR Parameter icm/HTTP/redirect_0 defined multiple times. [icxxcheckcon 2697]
[Thr 572] *** ERROR => ERROR Parameter icm/HTTP/redirect_1 defined multiple times. [icxxcheckcon 2697]
[Thr 572] *** ERROR => ERROR Parameter icm/server_port_0 defined multiple times. [icxxcheckcon 2697]
[Thr 572] *** ERROR => ERROR Parameter icm/server_port_1 defined multiple times. [icxxcheckcon 2697]
[Thr 572] *** ERROR => ERROR Parameter "icm/HTTP/redirect_2" is set to invalid value "PREFIX=/, FROMPORT=https, FOR=sapprdcluster.awqaf.gov.kw, TO=/sap/bc/webdynpro/sap/HRESS_A_MENU, PROT=https, HOST=sapprdcluster": Unknown sub parameter name: FROMPORT [icxxcheckcon 2697]
[Thr 572] IcrCoreInitSessionTable: Session table initialized
[Thr 1876] Adding HttpRedirectHandler: PREFIX=/,TO=/irj/portal,HOST=sapweb.awqaf.gov.kw
[Thr 1876] HttpISubHandlerAdd: Added handler HttpRedirectHandler(00000000024CB540), slot=0, flags=4098) for /, active: 1, table 00000000024796C0
[Thr 1876] Adding HttpRedirectHandler: PREFIX=/,TO=/irj/portal,HOST=sapweb.awqaf.gov.kw
[Thr 1876] HttpISubHandlerAdd: Added handler HttpRedirectHandler(00000000022FA250), slot=1, flags=4098) for /, active: 1, table 00000000024796C0
[Thr 1876] Adding HttpRedirectHandler: PREFIX=/, FROMPORT=https, FOR=sapprdcluster.awqaf.gov.kw, TO=/sap/bc/webdynpro/sap/HRESS_A_MENU, PROT=https, HOST=sapprdcluster
[Thr 1876] *** WARNING => IcmParseSubParam: unknown subparam "https" for parameter: PREFIX=/, FROMPORT=https, FOR=sapprdcluster.awqaf.gov.kw, TO=/sap/bc/webdynpro/sap/HRESS_A_MENU, PROT=https, HOST=sapprdcluster [icxxpara.c 644]
[Thr 1876] HttpISubHandlerAdd: Added handler HttpRedirectHandler(00000000022FA2D0), slot=2, flags=4098) for /, active: 1, table 00000000024796C0
[Thr 1876] Adding HttpAdminHandler: PREFIX=/sap/wdisp/admin,DOCROOT=F:\usr\sap\WDA\W00\data\icmandir,AUTHFILE=F:\usr\sap\WDA\SYS\global\security\data\icmauth.txt
[Thr 1876] HttpExtractArchive: files from archive F:\usr\sap\WDA\SYS\exe\uc\NTAMD64/wdispadmin.SAR in directory F:/usr/sap/WDA/W00/data/icmandir are up to date
[Thr 1876] HttpISubHandlerAdd: Added handler HttpAdminHandler(00000000024798F0), slot=3, flags=45061) for /sap/wdisp/admin, active: 1, table 00000000024796C0
[Thr 1876] Adding HttpModHandler: PREFIX=/
[Thr 1876] CsiInit(): Initializing the Content Scan Interface
[Thr 1876] PC with Windows NT (mt,unicode,SAP_CHAR/size_t/void* = 16/64/64)
[Thr 1876] CsiInit(): CSA_LIB = "F:\usr\sap\WDA\SYS\exe\uc\NTAMD64\sapcsa.dll"
[Thr 1876] HttpISubHandlerAdd: Added handler HttpModHandler(0000000002479970), slot=4, flags=12293) for /, active: 1, table 00000000024796C0
[Thr 1876] Thu Jan 07 09:10:36 2016
[Thr 1876] Adding HttpAuthHandler: PREFIX=/,FILTER=SAP
[Thr 1876] HttpISubHandlerAdd: Added handler HttpAuthHandler(00000000078B5E50), slot=5, flags=12293) for /, active: 1, table 00000000024796C0
[Thr 1876] HttpISubHandlerAdd: Added handler HttpWebDispHandler(0000000017553470), slot=6, flags=1060869) for /, active: 1, table 00000000024796C0
[Thr 1876] WebSocketPlugInInit: WebSocket Plugin initialized
[Thr 1876] IcmAddHiddenService: Hidden service WEBSOCKETS started
[Thr 1876] =================================================
[Thr 1876] = SSL Initialization platform tag=(ntamd64-msc18)
[Thr 1876] = (745_REL,Oct 12 2015,mt,ascii-uc,SAP_UC/size_t/void* = 16/64/64)
[Thr 1876] DIR_INSTANCE="F:\usr\sap\WDA\W00"
[Thr 1876] DIR_LIBRARY="F:\usr\sap\WDA\SYS\exe\uc\NTAMD64"
[Thr 1876] ssl/ssl_lib="F:\usr\sap\WDA\SYS\exe\uc\NTAMD64\sapcrypto.dll"
[Thr 1876] profile param "ssl/ssl_lib" = "F:\usr\sap\WDA\SYS\exe\uc\NTAMD64\sapcrypto.dll"
[Thr 1876] resulting Filename = "F:\usr\sap\WDA\SYS\exe\uc\NTAMD64\sapcrypto.dll"
[Thr 1876] = disabled FIPS 140-2 crypto kernel
[Thr 1876] = found CommonCryptoLib (SAPCRYPTOLIB) Version 8.4.41 pl40 (Aug 18 2015) MT-safe
[Thr 1876] = current UserID: AWQAF\SAPServiceWDA
[Thr 1876] = found SECUDIR environment variable
[Thr 1876] = using SECUDIR=F:\usr\sap\WDA\W00\sec
[Thr 1876] ssl/ciphersuites="HIGH:MEDIUM:+e3DES:!aNULL"
[Thr 1876] ssl/client_ciphersuites="HIGH:MEDIUM:+e3DES:!aNULL"
[Thr 1876] = secussl_Create_SSL_CTX(): PSE "F:\usr\sap\WDA\W00\sec\SAPSSLC.pse" not found,
[Thr 1876] = using PSE "F:\usr\sap\WDA\W00\sec\SAPSSLS.pse" as fallback
[Thr 1876] = secussl_Create_SSL_CTX(): PSE "F:\usr\sap\WDA\W00\sec\SAPSSLA.pse" not found,
[Thr 1876] = using PSE "F:\usr\sap\WDA\W00\sec\SAPSSLS.pse" as fallback
[Thr 1876] ******** Warning ********
[Thr 1876] *** No SSL-client PSE "SAPSSLC.pse" available
[Thr 1876] *** -- this might limit SSL-client side connectivity
[Thr 1876] ********
[Thr 1876] = Success -- SapCryptoLib SSL ready!
[Thr 1876] =================================================
[Thr 1876]
[Thr 1876] Started service HOST=sapweb.awqaf.gov.kw,PORT=443,PROT=HTTPS,TIMEOUT=60,PROCTIMEOUT=60,VCLIENT=1
[Thr 1876] SSL settings: verify_client: 1, cache_size: -1, cache_lifetime: -1, credfile: SAPSSLS.pse, ciphers: default
[Thr 1876] IcmAddHiddenService: Hidden service WEBSOCKET started
[Thr 1876] Started service HOST=sapweb.awqaf.gov.kw,PORT=80,PROT=HTTP,TIMEOUT=60,PROCTIMEOUT=60
[Thr 572] IcmCreateWorkerThreads: created worker thread 0
[Thr 572] IcmCreateWorkerThreads: created worker thread 1
[Thr 572] IcmCreateWorkerThreads: created worker thread 2
[Thr 572] IcmCreateWorkerThreads: created worker thread 3
[Thr 572] IcmCreateWorkerThreads: created worker thread 4
[Thr 572] IcmCreateWorkerThreads: created worker thread 5
[Thr 572] IcmCreateWorkerThreads: created worker thread 6
[Thr 572] Thu Jan 07 09:10:36 2016
[Thr 572] IcmCreateWorkerThreads: created worker thread 7
[Thr 572] IcmCreateWorkerThreads: created worker thread 8
[Thr 572] IcmCreateWorkerThreads: created worker thread 9
[Thr 2820] IcmWatchDogThread: watchdog started
[Thr 1488] Thu Jan 07 09:10:38 2016
[Thr 1488] *** ERROR => Read info from PRD message server sapprdcluster.awqaf.gov.kw failed: HTTP code 404, see also SAP note 1528396 [icrxx.c 4205]
[Thr 572] *** SAP Web Dispatcher up and operational (pid: 3048, HTTP: 80, HTTPS: 443) ***
[Thr 572] ***LOG IM3=> SAP Web Dispatcher, Startup (SAP Web Dispatcher&3048&) [IoEngine.cpp 74]
[Thr 1924] Thu Jan 07 09:11:03 2016
[Thr 1924] *** ERROR => Read info from PRD message server sapprdcluster.awqaf.gov.kw failed: HTTP code 404, see also SAP note 1528396 [icrxx.c 4205]