Problem with CUA

Hi Team,
we implemented CUA in our CRM system such as NCSCLNT300 was made as CUA and NCSCLNT200 as child system.
CUA works well in most cases except for the below issue.
1. For some roles available in client NCSCLNT200, when we try to add it to a user in CUA, system throws a error 'The central system does not have any information about the existence of role SAP_CRM_COMPETITOR in child system NCSCLNT200'
we have performed a text comparison but it didn't help. Thanks to help.

Hi,
if the text comparison does not work, there are only 2 possible causes:
1. the logical system name of the child system is not defined correctly (review table t000!)
2. the rfc-connection from child to central system is not configured correctly.
In most cases cause 1 is applicable. the fact, that you think that the text comparison works perfectly for other roles could be also that you have another system in the landscape with the same logical system name containing that same roles.
Simple test: create a role form scratch in child and trigger the text comparison direktly in pfcg of the child system.
Is the role thena available in the central system?
An indication for cause 2 would also be no confirmed status in SCUL.
b.rgds, Bernhard

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Problems with CUA

Hi,
I have a problem with the CUA.
We have scheduled the report RBDAPP01 for IDoc inbound processing. Oubound IDOCs are triggered immediately. The job RBDAPP01 is scheduled every five minutes.
We have scheduled the Report PFCG_TIME_DEPENDENCY as well once a day at 22:00.
Role assignment is only allowed in the central system.
Now, we have the problem, that an empolyee has deleted several roles. With the report RBDAPP01 this delete has taken affect. But at 22:05 the roles that were deleted before, were assigned to the user again.
Do you have any idea about this effect?
Best regards and thank you for your help.
Bjoern

Hi Bjoern,
You are likely to get more help in the Security Forum. This is for the SAP NetWeaver Identity Management tool.
Best Regards,
Matt

Problems in CUA..

Hello,
We are facing some problems with CUA setup.
Last week we removed a child system from CUA and changed its SID and now we are trying to add the system into CUA.
When the system is added through SCUA in Central system it goes fine without a single error, but the system is not found in SCUA list in child system. Also when we add the system with new SID in central system, it shows the old SID and not the new SID
under SAP Systems column.
We are able to transfer users from Central system but not able to modify users from Central system.
All steps were followed as per SAP docs when deleting the child system from CUA.
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Hello,
Child system was deleted as per SAP docs. Why do I need to run RSDELCUA in child system?
The point I forgot to say is the system we copied (the old system) is still active in the landscape but not
connected to CUA. CUA is our SOLMAN system were we have SLD running, is this causing CUA to read the old systems
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CUA problem with composite role

Hello experts, I have a problem with a composite role in my CUA parent system. If you look at the roles tab you will see one of the child roles has a name of child CUA system in the 'target sys' column. the rest all have 'user system'. Can anyone explain how this 'target sys' column is defined?
Thanks
Dave Wood

I do not know if you have solved this issue, but the target system is defined within your single role on you menu tab.
No what happens is that in transaction SM30 table SSM_RFC you define system variable linked to your logical system.
This variable determines that when you import roles from another system by means of transaction PFCG > Read from other system from RFC and you select your variable the system will automatically default in the target system field the system it is suppose to go back to.
So this way when you distibute the roles it will only go back to that particular target system, and you do not need to specify and guess where the role came from.
Try removing that table entry in SM30 SSM_RFC and see if that way you will be able to remove the target system from the role.
However it is not a bad thing to have activated. If you are working with position base authorizations and you have more than 1 system, you define 1 composite role for all the roles, for all the systems and you will be able to see where the composite resides by means of the target value.
Hope this makes sense.
Regards
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Problem with Java Stack- dev_w2 log mentioned.

Hi everyone, I have a problem with Java Stack, I could not connect to XI home page,
I am unable to login to j2ee engine using visual Administrator.
Please go through the log below. And help me out to resolve this issue and let me know what could be the problem.
trc file: "dev_w2", trc level: 1, release: "640"
ACTIVE TRACE LEVEL           1
ACTIVE TRACE COMPONENTS      all, M
B
B create_con (con_name=R/3)
B Loading DB library 'C:\usr\sap\SXI\SYS\exe\run\dboraslib.dll' ...
B Library 'C:\usr\sap\SXI\SYS\exe\run\dboraslib.dll' loaded
B Version of 'C:\usr\sap\SXI\SYS\exe\run\dboraslib.dll' is "640.00", patchlevel (0.39)
B New connection 0 created
M systemid   560 (PC with Windows NT)
M relno      6400
M patchlevel 0
M patchno    43
M intno      20020600
M make:      multithreaded, Unicode
M pid        4140
M
M ***LOG Q0Q=> tskh_init, WPStart (Workproc 2 4140) [dpxxdisp.c   1160]
I MtxInit: -2 0 0
M DpSysAdmExtCreate: ABAP is active
M DpSysAdmExtCreate: JAVA is not active
M DpShMCreate: sizeof(wp_adm)          13160     (1316)
M DpShMCreate: sizeof(tm_adm)          2780232     (13832)
M DpShMCreate: sizeof(wp_ca_adm)          24000     (80)
M DpShMCreate: sizeof(appc_ca_adm)     8000     (80)
M DpShMCreate: sizeof(comm_adm)          290000     (580)
M DpShMCreate: sizeof(vmc_adm)          0     (372)
M DpShMCreate: sizeof(wall_adm)          (38456/34360/64/184)
M DpShMCreate: SHM_DP_ADM_KEY          (addr: 060A0040, size: 3195320)
M DpShMCreate: allocated sys_adm at 060A0040
M DpShMCreate: allocated wp_adm at 060A1B58
M DpShMCreate: allocated tm_adm_list at 060A4EC0
M DpShMCreate: allocated tm_adm at 060A4EE8
M DpShMCreate: allocated wp_ca_adm at 0634BB30
M DpShMCreate: allocated appc_ca_adm at 063518F0
M DpShMCreate: allocated comm_adm_list at 06353830
M DpShMCreate: allocated comm_adm at 06353848
M DpShMCreate: allocated vmc_adm_list at 0639A518
M DpShMCreate: system runs without vmc_adm
M DpShMCreate: allocated ca_info at 0639A540
M DpShMCreate: allocated wall_adm at 0639A548
X EmInit: MmSetImplementation( 2 ).
X <ES> client 2 initializing ....
X <ES> InitFreeList
X Using implementation flat
M <EsNT> Memory Reset disabled as NT default
X ES initialized.
M
M calling db_connect ...
C Got ORACLE_HOME=c:\oracle\ora92 from environment
C Client NLS settings: AMERICAN_AMERICA.UTF8
C Logon as OPS$-user to get SAPSXI's password
C Connecting as /@SXI on connection 0 ...
C Attaching to DB Server SXI (con_hdl=0,svchp=04494404,svrhp=04495074)
C
C Starting user session (con_hdl=0,svchp=04494404,srvhp=04495074,usrhp=0449D8AC)
C
C Now I'm connected to ORACLE
C Got SAPSXI's password from OPS$-user
C Disconnecting from connection 0 ...
C Closing user session (con_hdl=0,svchp=04494404,usrhp=0449D8AC)
C Now I'm disconnected from ORACLE
C Connecting as SAPSXI/<pwd>@SXI on connection 0 ...
C Starting user session (con_hdl=0,svchp=04494404,srvhp=04495074,usrhp=0449D8AC)
C Now I'm connected to ORACLE
C Database NLS settings: AMERICAN_AMERICA.UTF8
C Database instance sxi is running on STARXI with ORACLE version 9.2.0.5.0 since 20081020
B Connection 0 opened
B Wp Hdl ConName          ConId     ConState     TX PRM RCT TIM MAX OPT Date     Time   DBHost
B 000 000 R/3              000000000 ACTIVE       NO YES NO 000 255 255 20081020 123752 STARXI
M db_connect o.k.
I MtxInit: 2 0 0
M SHM_PRES_BUF               (addr: 08230040, size: 4400128)
M SHM_ROLL_AREA          (addr: 62E40040, size: 77594624)
M SHM_PAGING_AREA          (addr: 08670040, size: 39845888)
M SHM_ROLL_ADM               (addr: 0AC80040, size: 775412)
M SHM_PAGING_ADM          (addr: 0AD40040, size: 525344)
M ThCreateNoBuffer          allocated 540152 bytes for 1000 entries at 0ADD0040
M ThCreateNoBuffer          index size: 3000 elems
M ThCreateVBAdm          allocated 12160 bytes (50 server) at 0AE60040
X EmInit: MmSetImplementation( 2 ).
X <ES> client 2 initializing ....
X Using implementation flat
X ES initialized.
B
B db_con_shm_ini: WP_ID = 2, WP_CNT = 10
B dbtbxbuf: Buffer TABL (addr: 103D00C8, size: 30000128, end: 1206C4C8)
B dbtbxbuf: Profile: max_objects = 5000, displace = 1, reorg = 1
B dbtbxbuf: request_unit = 2000, sync_reload = 5, inval_reload = 5
B dbtbxbuf: protect_shm = 0, force_checks = 0
B dbtbxbuf: tsize_retry = 14302848
B ***LOG BB0=> buffer TABL       started with length 30000128   bytes [dbtbxbuf#7 @ 15714] [dbtbxbuf1571 4]
B dbtbxbuf: Buffer TABLP (addr: 0E4000C8, size: 10240000, end: 0EDC40C8)
B dbtbxbuf: Profile: max_objects = 500, displace = 1, reorg = 1
B dbtbxbuf: request_unit = 2000, sync_reload = 5, inval_reload = 5
B dbtbxbuf: protect_shm = 0, force_checks = 0
B dbtbxbuf: tsize_retry = 5046656
B ***LOG BB0=> buffer TABLP      started with length 10240000   bytes [dbtbxbuf#7 @ 15714] [dbtbxbuf1571 4]
B dbtbxbuf: Reading TBX statistics:
B dbtbxbuf: 41 object entries precreated
B Layout of EIBUF buffer shared memory:
B 0: 1 * 4 = 4
B 1: 1 * 344 = 344
B 2: 10 * 20 = 200
B 3: 4001 * 48 = 192048
B 4: 2000 * 232 = 464000
B 5: 4001 * 4 = 16004
B 6: 1 * 200 = 200
B 7: 65 * 4 = 260
B 8: 13754 * 256 = 3521024
B Tracing = 0, Shm Protection = 0, Force checks = 0
B dbexpbuf: Buffer EIBUF (addr: 0EDE00D0, size: 4194304, end: 0F1E00D0)
B ***LOG BB0=> buffer EIBUF      started with length 4096k      bytes [dbexpbuf#5 @ 2322] [dbexpbuf2322 ]
B Layout of ESM   buffer shared memory:
B 0: 1 * 4 = 4
B 1: 1 * 344 = 344
B 2: 10 * 20 = 200
B 3: 4001 * 48 = 192048
B 4: 2000 * 232 = 464000
B 5: 4001 * 4 = 16004
B 6: 1 * 200 = 200
B 7: 65 * 4 = 260
B 8: 13754 * 256 = 3521024
B Tracing = 0, Shm Protection = 0, Force checks = 0
B dbexpbuf: Buffer ESM   (addr: 0F1F00D0, size: 4194304, end: 0F5F00D0)
B ***LOG BB0=> buffer ESM        started with length 4096k      bytes [dbexpbuf#5 @ 2322] [dbexpbuf2322 ]
B Layout of CUA   buffer shared memory:
B 0: 1 * 4 = 4
B 1: 1 * 344 = 344
B 2: 10 * 20 = 200
B 3: 3001 * 48 = 144048
B 4: 1500 * 232 = 348000
B 5: 3001 * 4 = 12004
B 6: 1 * 200 = 200
B 7: 193 * 4 = 772
B 8: 5012 * 512 = 2566144
B Tracing = 0, Shm Protection = 0, Force checks = 0
B dbexpbuf: Buffer CUA   (addr: 0F6000D0, size: 3072000, end: 0F8EE0D0)
B ***LOG BB0=> buffer CUA        started with length 3000k      bytes [dbexpbuf#5 @ 2322] [dbexpbuf2322 ]
B Layout of OTR   buffer shared memory:
B 0: 1 * 4 = 4
B 1: 1 * 344 = 344
B 2: 10 * 20 = 200
B 3: 4001 * 48 = 192048
B 4: 2000 * 232 = 464000
B 5: 4001 * 4 = 16004
B 6: 1 * 200 = 200
B 7: 81 * 4 = 324
B 8: 13754 * 256 = 3521024
B Tracing = 0, Shm Protection = 0, Force checks = 0
B dbexpbuf: Buffer OTR   (addr: 0F8F00D0, size: 4194304, end: 0FCF00D0)
B ***LOG BB0=> buffer OTR        started with length 4096k      bytes [dbexpbuf#5 @ 2322] [dbexpbuf2322 ]
B ***LOG BB0=> buffer CALE       started with length 500000     bytes [dbcalbuf#1 @ 2206] [dbcalbuf2206 ]
B dbtran INFO (init_connection '<DEFAULT>' [ORACLE:640.00]):
B   max_blocking_factor = 15, max_in_blocking_factor      =   5,
B   min_blocking_factor = 10, min_in_blocking_factor      =   5,
B   prefer_union_all    =   0, prefer_union_for_select_all =   0,
B   prefer_fix_blocking =   0, prefer_in_itab_opt          =   1,
B   convert AVG         =   0, alias table FUPD            =   0,
B   escape_as_literal   =   1, opt GE LE to BETWEEN        =   0,
B   select *            =0x0f, character encoding          = STD / <none>:-,
B   use_hints           = abap->1, dbif->0x1, upto->2147483647, rule_in->0,
B                         rule_fae->0, concat_fae->0, concat_fae_or->0
M
M PfHIndInitialize: memory=<0AEEC488>, header=<0AEEC488>, records=<0AEEC4D0>
M SecAudit(init_sel_info): init of SCSA completed: 02 slots used
M ***LOG AV6=> 02& [rsauwr1.c    1619]
M SsfSapSecin: automatic application server initialization for SAPSECULIB
N SsfSapSecin: Looking for PSE in database
N SsfPseLoad: started...(path=C:\usr\sap\SXI\DVEBMGS00\sec, AS=starxi, instanceid=00)
N
N SsfPseLoad: Downloading file C:\usr\sap\SXI\DVEBMGS00\sec\SAPSYS.pse (client:    , key: SYSPSE, len: 1078)
N SsfPseLoad: ended (1 of 1 sucessfully loaded, 1 checked...
N MskiCreateLogonTicketCache: Logon Ticket cache created in shared memory.
N MskiCreateLogonTicketCache: Logon Ticket cache pointer registered in shared memory.
M rdisp/reinitialize_code_page -> 0
M icm/accept_remote_trace_level -> 0
M rdisp/no_hooks_for_sqlbreak -> 0
S
S *** init spool environment
S initialize debug system
T Stack direction is downwards.
T debug control: prepare exclude for printer trace
T new memory block 121963B0
S spool kernel/ddic check: Ok
S using table TSP02FX for frontend printing
S 1 spool work process(es) found
S frontend print via spool service enabled
S printer list size is 150
S printer type list size is 50
S queue size (profile)   = 300
S hostspool list size = 3000
S option list size is 30
S      intervals: query=50, rescan=1800, global=300 info=120
S      processing queue enabled
S creating spool memory service RSPO-RCLOCKS at 0FEB00A8
S doing lock recovery
S setting server cache root
S using server cache size 100 (prof=100)
S creating spool memory service RSPO-SERVERCACHE at 0FEB0370
S    using messages for server info
S size of spec char cache entry: 297028 bytes (timeout 100 sec)
S size of open spool request entry: 2132 bytes
S immediate print option for implicitely closed spool requests is disabled
A
A
A -PXA--
A PXA INITIALIZATION
A PXA: Fragment Size too small: 73 MB, reducing # of fragments
A System page size: 4kb, admin_size: 5032kb.
A PXA allocated (address 67850040, size 150000K)
A System name
A ORACLE...........................SXI........20081004121019.....................................
A is used for RFC security.
A Sharedbuffer token: 41534050...33 (len: 111)====== 2b61c190857e36a8681ef39a...
A abap/pxa = shared protect gen_remote
A PXA INITIALIZATION FINISHED
A -PXA--
A
A ABAP ShmAdm initialized (addr=579F4000 leng=20955136 end=58DF0000)
A >> Shm MMADM area (addr=57E69DF0 leng=126176 end=57E88AD0)
A >> Shm MMDAT area (addr=57E89000 leng=16150528 end=58DF0000)
A RFC rfc/signon_error_log = -1
A RFC rfc/dump_connection_info = 0
A RFC rfc/dump_client_info = 0
A RFC rfc/cp_convert/ignore_error = 1
A RFC rfc/cp_convert/conversion_char = 23
A RFC rfc/wan_compress/threshold = 251
A RFC rfc/recorder_pcs not set, use defaule value: 2
A RFC rfc/delta_trc_level not set, use default value: 0
A RFC rfc/no_uuid_check not set, use default value: 0
A RFC Method> initialize RemObjDriver for ABAP Objects
A Hotpackage version: 9
M ThrCreateShObjects          allocated 10568 bytes at 0FFD0040
M ThVBStartUp: restart pending update requests
M
M ThVBAutoStart: update-auto-delete
N SsfSapSecin: putenv(SECUDIR=C:\usr\sap\SXI\DVEBMGS00\sec): ok
N SsfSapSecin: PSE C:\usr\sap\SXI\DVEBMGS00\sec\SAPSYS.pse found!
N
N =================================================
N === SSF INITIALIZATION:
N ===...SSF Security Toolkit name SAPSECULIB .
N ===...SSF trace level is 0 .
N ===...SSF library is C:\usr\sap\SXI\SYS\exe\run\sapsecu.dll .
N ===...SSF hash algorithm is SHA1 .
N ===...SSF symmetric encryption algorithm is DES-CBC .
N ===...sucessfully completed.
N =================================================
N MskiInitLogonTicketCacheHandle: Logon Ticket cache pointer retrieved from shared memory.
N MskiInitLogonTicketCacheHandle: Workprocess runs with Logon Ticket cache.
W =================================================
W === ipl_Init() called
W    ITS Plugin: Path dw_gui
W    ITS Plugin: Description ITS Plugin - ITS rendering DLL
W    ITS Plugin: sizeof(SAP_UC) 2
W    ITS Plugin: Release: 640, [6400.0.43.20020600]
W    ITS Plugin: Int.version, [31]
W    ITS Plugin: Feature set: [3]
W    ===... Calling itsp_Init in external dll ===>
W === ipl_Init() returns 0, ITSPE_OK: OK
W =================================================
M MBUF info for hooks: MS component UP
M ThSetEnqName: set enqname by profile
M ThISetEnqname: enq name = >starxi_SXI_00                           <
E
E *************** EnqId_EN_ActionAtMsUpHook ***************
E Hook on upcoming Ms (with EnqSrv), get auth EnqId and check it locally
E Enqueue Info: enque/disable_replication = 2
E Enqueue Info: replication disabled
E
E
E *************** ObjShMem_CheckAuthoritativeEnqId ***************
E Checking authoritative EnqId from EnqSrv into ObjShMem
E ObjShMem_CheckAuthoritativeEnqId: ObjShMem ...
E EnqId.EnqTabCreaTime    = -999
E EnqId.RandomNumber      = -999
E ReqOrd.TimeInSecs       = -999
E ReqOrd.ReqNumberThisSec = -999
E ObjShMem_CheckAuthoritativeEnqId: ObjShMem ...
E EnqId.EnqTabCreaTime    = -999
E EnqId.RandomNumber      = -999
E ReqOrd.TimeInSecs       = -999
E ReqOrd.ReqNumberThisSec = -999
E ObjShMem_CheckAuthoritativeEnqId: EnqId is initial in ShMem
E ObjShMem_CheckAuthoritativeEnqId: Overwrite incoming auth EnqId, continue
E EnqId inscribed into initial ObjShMem: (ObjShMem_CheckAuthoritativeEnqId)
E -SHMEM--
E EnqId:          EnqTabCreaTime/RandomNumber    = 20.10.2008 12:38:10 1224486490 / 4140
E ReqOrd at Srv: TimeInSecs/ReqNumberThisSec    = 20.10.2008 12:38:11 1224486491 / 1
E ReqOrd at Cli: TimeInSecs/ReqNumberThisSec    = 20.10.2008 12:38:11 1224486491 / 1
E Status:         STATUS_OK
E -
M ThActivateServer: state = STARTING
L Begin of BtcSysStartRaise
L Raise event SAP_SYSTEM_START with parameter <starxi_SXI_00       >
L End of BtcSysStartRaise
I
I MPI<c>9#3 Peak buffer usage: 5 (@ 64 KB)
M
M *** WARNING => ThCheckReqInfo: req_info & DP_CANT_HANDLE_REQ
M return number range rc 12
M *** WARNING => ThNoGet: get from object (cli/obj/subobj/range = 000/ALAUTOUID /      /01) returned rc 12
S
S server @>SSRV:starxi_SXI_00@< appears or changes (state 1)
B table logging switched off for all clients
S
S server @>SSRV:starxi_SXI_00@< appears or changes (state 1)
M
M hostaddrlist return 0
M
M hostaddrlist return 0
M
M hostaddrlist return 0
M hostaddrlist return 0
M hostaddrlist return 0
Regards,
Varun.

You probably made the same mistake as I did and added the tables manually to the "sample" database instead of the "sun-appserv-samples" database.
marc

How to delete users in the child systems with CUA?

Hi All,
We have:
1. My SAP ERP 2005 (ECC 6.0)+ Windows 64bit + Oracle 10
2. EP 7.0 + Windows 64bit + Oracle 10
3. BI 7.0 + Windows 64bit + Oracle 10
4. Solution Manager 4.0 (CUA)
We managed all our QA and DEV users in ECC, EP using CUA from the Solution Manager server (Productive servers and all the BI 7.0 System Landscape aren't in the CUA).
My problem is when i want to delete a user. Sometimes if you delete a user in the solution manager (where the CUA is defined) the user still exists in the Child Systems. In fact you can see it with the SU01 only in the child system. I guess the idea is that if you delete the user in the CUA them the user is delete in the child system.
I found this information in the SAP Help:
As well as the authorizations already mentioned, you also need another authorization in the central system for object S_USER_SYS. You can only assign new systems to a new user with this authorization. ( No Problem with this )
When a user is deleted in the central system, the system entry for the user is retained until the deletion is confirmed. If an error occurs, you can repeat the deletion by canceling the system (in the child system).
What does mean: deletion is confirmed?
Best Regards,
Erick Ilarraza

Hi, thanks a lot for your reply.
We used the SAP Transaction SCUG to solve CUA Problem.
It is something about the refresh of the user in the Parent / Child systems, you need to Re-Refresh users and delete it again.
Best Regrads,
Erick Ilarraza

Portal with CUA userbase

Hi,
Our Scenario:
We are using portal with CUA userbase.
But, now we want to use the portal for a Non-CUA system users ( this system is not part of CUA)
How can I set up the portal authentication ? Can I setup two user bases ?
Please advice

Are you talking about the same portal or different portal systems ?
If you are talking about the same portal, the only option I see is to add the other users to the CUA. If you are talking about a two portal installations, there is no problem, except that for SSO, the users have to have the same name in both installations.
Regards,
Patrick

Problems with Automatic Workflow Customizing

Hi!
I am having problems with Automatic Workflow Customizing (SWU3). I am trying to execute "Configure RFC Destination" manually. I receive the message "Synchronization of passwords failed".
We are using CUA and it is therefor not possible to create the user from SWU3 which means that WF-BATCH has been created in CUA with a pw which is then filled in by me when executing "Configure RFC Destination".
WF-BATCH has authorization SAP_NEW, SAP_ALL
My user also has SAP_NEW and SAP_ALL and usergroup SUPER.
Does anyone know what might be the problem?
Sincerley
Anders Öhrling

Hello Anders,
Check if the user is locked in SU01. Then check if your user has been created in CUA.
It is recommended to delete WF_BATCH. The system will auto create the user ID WF-BATCH and synchronize the password.
Do let me know if your problem is resolved.
Thank you.
Regards,
Manomeet
- Award points if helpful -

A problem with threads

I am trying to implement some kind of a server listening for requests. The listener part of the app, is a daemon thread that listens for connections and instantiates a handling daemon thread once it gets some. However, my problem is that i must be able to kill the listening thread at the user's will (say via a sto button). I have done this via the Sun's proposed way, by testing a boolean flag in the loop, which is set to false when i wish to kill the thread. The problem with this thing is the following...
Once the thread starts excecuting, it will test the flag, find it true and enter the loop. At some point it will LOCK on the server socket waiting for connection. Unless some client actually connects, it will keep on listening indefinatelly whithought ever bothering to check for the flag again (no matter how many times you set the damn thing to false).
My question is this: Is there any real, non-theoretical, applied way to stop thread in java safely?
Thank you in advance,
Lefty

This was one solution from the socket programming forum, have you tried this??
public Thread MyThread extends Thread{
     boolean active = true;
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          while (active){
               try{
                    serverSocket = ss.accept();
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Problem with Threads and a static variable

I have a problem with the code below. I am yet to make sure that I understand the problem. Correct me if I am wrong please.
Code functionality:
A timer calls SetState every second. It sets the state and sets boolean variable "changed" to true. Then notifies a main process thread to check if the state changed to send a message.
The problem as far I understand is:
Assume the timer Thread calls SetState twice before the main process Thread runs. As a result, "changed" is set to true twice. However, since the main process is blocked twice during the two calls to SetState, when it runs it would have the two SetState timer threads blocked on its synchronized body. It will pass the first one, send the message and set "changed" to false since it was true. Now, it will pass the second thread, but here is the problem, "changed" is already set to false. As a result, it won't send the message even though it is supposed to.
Would you please let me know if my understanding is correct? If so, what would you propose to resolve the problem? Should I call wait some other or should I notify in a different way?
Thanks,
B.D.
Code:
private static volatile boolean bChanged = false;
private static Thread objMainProcess;
   protected static void Init(){
        objMainProcess = new Thread() {
            public void run() {
                while( objMainProcess == Thread.currentThread() ) {
                   GetState();
        objMainProcess.setDaemon( true );
        objMainProcess.start();
    public static void initStatusTimer(){
        if(objTimer == null)
             objTimer = new javax.swing.Timer( 1000, new java.awt.event.ActionListener(){
                public void actionPerformed( java.awt.event.ActionEvent evt){
                          SetState();
    private static void SetState(){
        if( objMainProcess == null ) return;
        synchronized( objMainProcess ) {
            bChanged = true;
            try{
                objMainProcess.notify();
            }catch( IllegalMonitorStateException e ) {}
    private static boolean GetState() {
        if( objMainProcess == null ) return false;
        synchronized( objMainProcess ) {
            if( bChanged) {
                SendMessage();
                bChanged = false;
                return true;
            try {
                objMainProcess.wait();
            }catch( InterruptedException e ) {}
            return false;
    }

Thanks DrClap for your reply. Everything you said is right. It is not easy to make them alternate since SetState() could be called from different places where the state could be anything else but a status message. Like a GREETING message for example. It is a handshaking message but not a status message.
Again as you said, There is a reason I can't call sendMessage() inside setState().
The only way I was able to do it is by having a counter of the number of notifies that have been called. Every time notify() is called a counter is incremented. Now instead of just checking if "changed" flag is true, I also check if notify counter is greater than zero. If both true, I send the message. If "changed" flag is false, I check again if the notify counter is greater than zero, I send the message. This way it works, but it is kind of a patch than a good design fix. I am yet to find a good solution.
Thanks,
B.D.

Problem with threads running javaw

Hi,
Having a problem with multi thread programming using client server sockets. The program works find when starting the the application in a console using java muti.java , but when using javaw multi.java the program doesnt die and have to kill it in the task manager. The program doesnt display any of my gui error messages either when the server disconnect the client. all works find in a console. any advice on this as I havent been able to understand why this is happening? any comment would be appreciated.
troy.

troy,
Try and post a minimum code sample of your app which
does not work.
When using javaw, make sure you redirect the standard
error and standard output streams to file.
Graeme.Hi Graeme,
I dont understand what you mean by redirection to file? some of my code below.
The code works fine under a console, code is supposed to exit when the client (the other server )disconnects. the problem is that but the clientworker side of the code still works. which under console it doesnt.
public class Server{
ServerSocket aServerSocket;
Socket dianosticsSocket;
Socket nPortExpress;
ClientListener aClientListener;
LinkedList queue = new LinkedList();
int port = 0;
int clientPort = 0;
String clientName = null;
boolean serverAlive = true;
* Server constructor generates a server
* Socket and then starts a client threads.
* @param aPort      socket port of local machine.
public Server(int aPort, String aClientName, int aClientPort){
port = aPort;
clientName = aClientName;
clientPort = aClientPort;
try{
// create a new thread
aServerSocket = new ServerSocket(port) ;
// connect to the nPortExpress
aClientListener = new ClientListener(InetAddress.getByName(clientName), clientPort, queue,this);
// aClientListener.setDaemon(true);
aClientListener.start();
// start a dianostic port
DiagnosticsServer aDiagnosticsServer = new DiagnosticsServer(port,queue,aClientListener);
// System.out.println("Server is running on port " + port + "...");
// System.out.println("Connect to nPort");
catch(Exception e)
// System.out.println("ERROR: Server port " + port + " not available");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Server port " + port + " not available", JOptionPane.ERROR_MESSAGE);
serverAlive = false;
System.exit(1);
while(serverAlive&&aClientListener.hostSocket.isConnected()){
try{
// connect the client
Socket aClient = aServerSocket.accept();
//System.out.println("open client connection");
//System.out.println("client local: "+ aClient.getLocalAddress().toString());
// System.out.println("client localport: "+ aClient.getLocalPort());
// System.out.println("client : "+ aClient.getInetAddress().toString());
// System.out.println("client port: "+ aClient.getLocalPort());
// make a new client thread
ClientWorker clientThread = new ClientWorker(aClient, queue, aClientListener, false);
// start thread
clientThread.start();
catch(Exception e)
//System.out.println("ERROR: Client connection failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client connection failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end constructor Server
void serverExit(){
     JOptionPane.showMessageDialog(null, "Server ","ERROR: nPort Failure", JOptionPane.ERROR_MESSAGE);
     System.exit(1);
}// end class Server
*** connect to another server
public class ClientListener extends Thread{
InetAddress hostName;
int hostPort;
Socket hostSocket;
BufferedReader in;
PrintWriter out;
boolean loggedIn;
LinkedList queue;      // reference to Server queue
Server serverRef; // reference to main server
* ClientListener connects to the host server.
* @param aHostName is the name of the host eg server name or IP address.
* @param aHostPort is a port number of the host.
* @param aLoginName is the users login name.
public ClientListener(InetAddress aHostName, int aHostPort,LinkedList aQueue,Server aServer)      // reference to Server queue)
hostName = aHostName;
hostPort = aHostPort;
queue = aQueue;
serverRef = aServer;
// connect to the server
try{
hostSocket = new Socket(hostName, hostPort);
catch(IOException e){
//System.out.println("ERROR: Connection Host Failed");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort Failed", JOptionPane.ERROR_MESSAGE);
System.exit(0);
} // end constructor ClientListener
** multi client connection server
ClientWorker(Socket aSocket,LinkedList aQueue, ClientListener aClientListener, boolean diagnostics){
queue = aQueue;
addToQueue(this);
client = aSocket;
clientRef = aClientListener;
aDiagnostic = diagnostics;
} // end constructor ClientWorker
* run method is the main loop of the server program
* in change of handle new client connection as well
* as handle all messages and errors.
public void run(){
boolean alive = true;
String aSubString = "";
in = null;
out = null;
loginName = "";
loggedIn = false;
while (alive && client.isConnected()&& clientRef.hostSocket.isConnected()){
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(client.getOutputStream()));
if(aDiagnostic){
out.println("WELCOME to diagnostics");
broadCastDia("Connect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
out.println("WELCOME to Troy's Server");
broadCastDia("Connect : client "+client.getInetAddress().toString());
     out.flush();
String line;
while(((line = in.readLine())!= null)){
StringTokenizer aStringToken = new StringTokenizer(line, " ");
if(!aDiagnostic){
broadCastDia(line);
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
else{
if(line.equals("GETIPS"))
getIPs();
else{
clientRef.sendMessage(line); // send mesage out to netExpress
out.println(line);
out.flush();
} // end while
catch(Exception e){
// System.out.println("ERROR:Client Connection reset");
                         JOptionPane.showMessageDialog(null, (e.toString()),"ERROR:Client Connection reset", JOptionPane.ERROR_MESSAGE);
try{
if(aDiagnostic){
broadCastDia("Disconnect : diagnostics "+client.getInetAddress().toString());
out.flush();
else {
broadCastDia("Disconnect : client "+client.getInetAddress().toString());
     out.flush();
// close the buffers and connection;
in.close();
out.close();
client.close();
// System.out.println("out");
// remove from list
removeThreadQueue(this);
alive = false;
catch(Exception e){
// System.out.println("ERROR: Client Connection reset failure");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Client Connection reset failure", JOptionPane.ERROR_MESSAGE);
}// end while
} // end method run
* method run - Generates io stream for communicating with the server and
* starts the client gui. Run also parses the input commands from the server.
public void run(){
boolean alive = true;
try{
// begin to life the gui
// aGuiClient = new ClientGui(hostName.getHostName(), hostPort, loginName, this);
// aGuiClient.show();
in = new BufferedReader(new InputStreamReader(hostSocket.getInputStream()));
out = new PrintWriter(new OutputStreamWriter(hostSocket.getOutputStream()));
while (alive && hostSocket.isConnected()){
String line;
while(((line = in.readLine())!= null)){
System.out.println(line);
broadCast(line);
} // end while
} // end while
catch(Exception e){
//     System.out.println("ERRORa Connection to host reset");
JOptionPane.showMessageDialog(null, (e.toString()),"ERROR: Connection to nPort reset", JOptionPane.ERROR_MESSAGE);
try{
hostSocket.close();
     }catch(Exception a){
     JOptionPane.showMessageDialog(null, (a.toString()),"ERROR: Exception", JOptionPane.ERROR_MESSAGE);
alive = false;
System.exit(1);
} // end method run

Problem with threads and camera.

Hi everybody!
I've a problem with taking snapshot.
I would like to display a loading screen after it take snapshot ( sometimes i
have to wait few seconds after i took snapshot. Propably photo is being taken in time where i have to wait).
I was trying to use threads but i didn't succeed.
I made this code:
display.setCurrent(perform);
        new Thread(new Runnable(){
            public void run() {
                while((!performing.isShown()) && (backgroundCamera.isShown())){
                    Thread.yield();
                notifyAll();
        }).start();
        new Thread(new Runnable(){
            public void run() {
                try {
                    this.wait();
                } catch(Exception e) {
                    exceptionHandler(e);
                photo = camera.snapshot();
                display.setCurrent(displayPhoto);
        }).start();This code is sometimes showing performing screen but sometimes no.
I don't know why. In my opinion performing.isShown() method isn't working correctly.
Does anyone have some idea how to use threads here?

Hi,
I've finally managed to work this fine.
The code:
       Object o = new Object();
       display.setCurrent(perform);
        new Thread(new Runnable(){
            public void run() {
                while(!performing.isShown()){
                    Thread.yield();
               synchronized(o) {
                  o.notify();
        }).start();
        new Thread(new Runnable(){
            public void run() {
                try {
                    synchronized(o) {
                       o.wait(1);
                } catch(Exception e) {
                    exceptionHandler(e);
                photo = camera.snapshot();
                display.setCurrent(displayPhoto);
        }).start();

Problem with threads hanging

We have a problem where our application stops responding after a few days of usage. Things will for fine for a day or two, and then pretty quickly threads will start getting hung up, usually in places where they are allocating memory
We are running WebLogic 8.1 SP2 on Sun JDK 1.4.2_04 on Solaris 8 using the alternate threading model and the -server hotspot vm. We are running pretty much the same code that we had no problems with under WebLogic 6.1 SP4 and Sun JDK 1.3.1.
A thread dump usually shows that some or all of our execute threads are in the state "waiting for monitor entry" even though they are not currently waiting on any java locks. Here is a sample thread from the thread dump (we have ~120 threads so I don't want to post the full dump).
=============================================================================================
"ExecuteThread: '8' for queue: 'itgCrmWarExecutionQueue'" daemon prio=5 tid=0x005941d0 nid=0x2c waiting for monitor entry [c807f000..c807fc28]
at java.lang.String.substring(String.java:1446)
at java.lang.String.substring(String.java:1411)
at weblogic.servlet.internal.ServletRequestImpl.getRelativeUri(ServletRequestImpl.java:1872)
at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:3492)
at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2585)
at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:197)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:170)
=============================================================================================
String.java line 1446 for this jdk allocates a new String object, and all the other threads in this state also are creating new objects or arrays, etc.
We've done a pstack on this process when it's in this state, and the threads that are in the "waiting for monitor entry" that look like they're allocating memory are all waiting on the same lwp_mutex_lock with some allocation method that's calling into the native TwoGenerationCollectorPolicy.mem_allocate_work (see pstack output below for the same thread as in the thread dump above)
=============================================================================================
----------------- lwp# 44 / thread# 44 --------------------
ff31f364 lwp_mutex_lock (e3d70)
fee92384 __1cNObjectMonitorGenter26MpnGThread__v_ (5000, 525c, 5000, 50dc, 4800, 4af0) + 2d8
fee324d4 __1cSObjectSynchronizerKfast_enter6FnGHandle_pnJBasicLock_pnGThread__v_ (c807f65c, c807f7d4, 5941d0, 0, 35d654, fee328ec) + 68
fee32954 __1cQinstanceRefKlassZacquire_pending_list_lock6FpnJBasicLock__v_ (c807f7d4, ff170000, d4680000, 4491d4, fee1bc2c,
0) + 78
fee3167c __1cPVM_GC_OperationNdoit_prologue6M_i_ (c807f7bc, 4400, ff170000, 2d2b8, 4a6268, c807fa18) + 38
fee2e0b0 __1cIVMThreadHexecute6FpnMVM_Operation__v_ (c807f7bc, 963a8, 0, 0, 1, 0) + 90
fed2c2a4 __1cbCTwoGenerationCollectorPolicyRmem_allocate_work6MIii_pnIHeapWord__ (962c0, ff1c29ec, ff1c297c, ff131a26, 4800, 4998) + 160
fed22940 __1cNinstanceKlassRallocate_instance6MpnGThread__pnPinstanceOopDesc__ (ee009020, 5941d0, 15ca581, 3647f0, 4a6268, c807f8c8) + 180
fed34928 __1cLOptoRuntimeFnew_C6FpnMklassOopDesc_pnKJavaThread__v_ (ee009018, 5941d0, 0, 0, 0, 0) + 28
fa435a58 ???????? (ee009018, e86de, 15ca4de, 50dc, 5941d0, c807f9c8)
fb36f9a4 ???????? (0, d412ccd8, ee046c28, ff170000, 0, 0)
fad8b278 ???????? (ee046c28, d6000c90, ee046530, 8, db8e8450, c807f9e8)
fad62abc ???????? (d412ccd8, ee046530, d6000c90, ee3bfa38, 8, c807fa18)
fa4b3c38 ???????? (c807fb9c, 0, f2134700, fa415e50, 8, c807faa8)
fa40010c ???????? (c807fc28, c807fe90, a, ee9e1e20, 4, c807fb40)
fed5d48c __1cJJavaCallsLcall_helper6FpnJJavaValue_pnMmethodHandle_pnRJavaCallArguments_pnGThread__v_ (c807fe88, c807fcf0, c807fda8, 5941d0, 5941d0, c807fd00) + 27c
fee4b784 __1cJJavaCallsMcall_virtual6FpnJJavaValue_nLKlassHandle_nMsymbolHandle_4pnRJavaCallArguments_pnGThread__v_ (ff170000, 594778, c807fd9c, c807fd98, c807fda8, 5941d0) + 164
fee5e8dc __1cJJavaCallsMcall_virtual6FpnJJavaValue_nGHandle_nLKlassHandle_nMsymbolHandle_5pnGThread__v_ (c807fe88, c807fe84, c807fe7c, c807fe74, c807fe6c, 5941d0) + 6c
fee6fc74 __1cMthread_entry6FpnKJavaThread_pnGThread__v_ (5941d0, 5941d0, 838588, 594778, 306d10, fee69254) + 128
fee6927c __1cKJavaThreadDrun6M_v_ (5941d0, 2c, 40, 0, 40, 0) + 284
fee6575c _start   (5941d0, fa1a1600, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Also when it's having this problem, the "VM Thread" is always using a lot of processor time. We did a couple of pstacks today while it was having this problem, and this thread was stuck in the ONMethodSweeper.sweep for over 15 minutes when we finally killed the server.
From the thread dump:
"VM Thread" prio=5 tid=0x000e2d20 nid=0x2 runnable
From the first pstack:
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed40c04 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (42a2f4, fa5fa46d, ffffffff, fc4ffcb8, 42a2f4, 42a324) + 124
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (42a2f0, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (fa5f7f88, fa608940, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start   (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Second pstack
=============================================================================================
----------------- lwp# 2 / thread# 2 --------------------
fed41180 __1cXvirtual_call_RelocationIparse_ic6FrpnICodeBlob_rpC5rppnHoopDesc_pi_nNRelocIterator__ (0, ff1b9664, ffffffff, fc4ffcb8, a6f2cc, fc4ffbd0) + 6a0
fed46318 __1cKCompiledIC2t5B6MpnKRelocation__v_ (a6f2c8, fc4ffd24, fc4ffd4c, e802, 0, 6) + 38
fed90c38 __1cHnmethodVcleanup_inline_caches6M_v_ (faded4c8, fadf2c80, 1, 0, fa400000, 6) + 1ac
fede18b4 __1cONMethodSweeperFsweep6F_v_ (2cf38, 0, ffffffff, ff1cf1fc, ff1c66e8, fede1d44) + 1b0
fede1e6c __1cUSafepointSynchronizeFbegin6F_v_ (2cf38, ff1ba138, 5000, 50dc, 5000, 525c) + 248
feef1fd4 __1cIVMThreadEloop6M_v_ (4400, 4000, 4324, 4000, 42b0, 3800) + 3d4
feef1ae4 __1cIVMThreadDrun6M_v_ (e2d20, 2, 40, 0, 40, 0) + 8c
fee6575c _start   (e2d20, ff270200, 0, 0, 0, 0) + 134
ff3758c0 lwpstart (0, 0, 0, 0, 0, 0)
=============================================================================================
Has anyone ever seen anything like this? I'm trying to figure out if this is caused by something we're doing, or something relating to our environment and jvm options. Any ideas?

Thanks for the reply - I'm testing our app with the +UseConcMarkSweepGC now in our test environment to make sure it doesn't cause any problems there. Unfortunately the only place we've had this problem is on the production server, so it's extra difficult debugging this.
We're using the following memory options:
-ms512m -mx512m -XX:NewSize=128m -XX:PermSize=192m -XX:MaxNewSize=128m -XX:MaxPermSize=192m -XX:SurvivorRatio=8and the following debugging options, as we've also been seeing OutOfMemoryErrors ( see http://forum.java.sun.com/thread.jsp?forum=37&thread=522354&tstart=45&trange=15 )
-verbosegc -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGCBTW, which c++filt version and options are you using? Our Solaris boxes only seem to have the GNU version installed. I was trying to run that on some of the other stack traces and wasn't getting anywhere, and didn't know if because it was GNU version wouldn't work on something compiled with the Sun compiler.
Thanks!
--Andy

Problem with threads and ProgressMonitor

Dear Friends:
I have a little problem with a thread and a ProgressMonitor. I have a long time process that runs in a thread (the thread is in an separate class). The thread has a ProgressMonitor that works fine and shows the tasks progress.
But I need deactivate the main class(the main class is the user interface) until the thread ends.
I use something like this:
LongTask myTask=new LongTask();
myTask.start();
myTask.join();
Now, the main class waits for the task to end, but the progress monitor don`t works fine: it shows only the dialog but not the progress bar.
What's wrong?

Is the dialog a modal dialog? This can block other UI updates.
In general, you should make sure that it isn't modal, and that your workThread has a fairly low priority so that the UI can do its updating

Problem with threads and/or memory

I'm developing an application where there are 3 threads. One of them sends a request to the other, and if the 2nd can't answer it, it sends it to the 3rd (similar to CPU -> CACHE -> MEMORY). When i run the program with 1000-10.000 requests, no problem occurs. When i run it with 300.000-1.000.000 requests, it sometimes hangs. Is this a problem with the garbage collector, or should it be related to the threads mecanism.
(note: eache thread is in execution using a finite state machine)

i had been running the program inside Netbeans.
Running the jar using the command line outside
Netbeans i have no more problems... Does Netbeans use
it's own JVM?Depends how you set it up, but look under the options. There are settings for the compiler and jvm that it uses.

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