Enqueue Server

I am getting a System Error message "System Error occured during lock management" in DWB when I use RSA1.Further it gives the message "Tree is locked and cannot be built".With this error the right panel of RSA1 shows blank.Does anyone encountered this problem and may I know the solution to resolve this issue asap.
Thanks
Prasad

hi Maik,
this link will give you more details , tutorial
http://onesearch.sun.com/search/onesearch/index.jsp?qt=%22enqueueserverlock+handler%22&charset=utf-8&rf=0&rt=1&nh=10&cs=0&y=7&x=5&col=dev-reference
Regards
Varun

Similar Messages

Enqueue server and Message server in ABAP/Java dual stack

Hi you guys,
I have some questions when studying SAP, could you please explain for me:
- In ABAP and Java system, do each stack have it own enqueue server and message server?
- What is the difference between Enqueue server and enqueue work process in ABAP stack?
- If there is one message server for each stack, which messager server (ABAP or Java) will the Web dispatcher connect directly to?
- How do ABAP message server and Java message server communicate with each other?
Thank you very much.

1. in Dual Stack, normally you have ABAP Stack and SCS Central service Instance. ABAP Instance has Message server, SCS has it own Message server and enqueue server. ABAP instance doesn't have enqueue server, because the SCS already has enqueue service
2. Communication between ABAP and J2EE Engine uses RFC (JCo) or HTTP Interface.
Web Dispatcher will connect to the ICM of that instance, and the ICM is talking to Abap dispatcher and J2EE Dispatcher.
3. The term: enqueue server and enqueue work process , already shows its different quite obviously.
What so confuse about it ? do some search on SAP Online Documentation.
Regards,
Vincent

SAP Enqueue Server needs 800 MB in NW CE SP3 Trial

We are very sorry that the SP3 download is delivered in an installation state that consumes more memory then it really needs. To solve this issue you can change some values in the profile CE1_SCS01_<hostname> in directory C:\usr\sap\CE1\SYS\profile (for an installation with standard values).
Please go to the following section and change values accordingly with a standard editor:
SAP Enqueue Server
enque/serverinst = 01
enque/table_size = 8000
ipc/shm_psize_34 = 0
enque/server/max_query_requests = 1000
enque/server/max_requests = 1000
#enque/async_req_max = 5000
enque/encni/threadcount = 4
rdisp/enqname = $(rdisp/myname)
enque/snapshot_pck_ids = 100
BR,
Oliver

BR, Oliver

Standalone Enqueue Server and HA

Hi
We are implementing HA for NW04s AS Java and AS ABAP. As per the latest SAP recommendations, we have decided to decouple Central Service Instance for AS ABAP too (ASCS) and will implement the Standalone Enqueue server and enqueue replication server.
My question is that:
Given that the Central Service Instance already has the Enqueue Process decoupled from the Central Instance,
a) do we still need to install the Standalone Enqueue Server separately?
OR
b) is an SCS equivalent to the Standalone Enqueue Server?
IF the answer is a), does the SCS contain only the Message Service?

When you de-couple the Central Instance for ABAP, you will get enqueue server and message server for ABAP as part of ASCS. That provides enqueue and message server functionality for ABAP portion of you Add-In system.
You still need to install SCS for Java portion of your Add-In system.
Thanks & Regards,
Venkat

Replicated enqueue server

Hi All
What are the key benifits of have a standalone enqueue server. I also heard about replicated enqueue server too. what is this. please tell me about both . i.e. advantages and desadvantages

Hi Muhammad,
Read,
http://help.sap.com/saphelp_nw2004s/helpdata/en/36/67973c3f5aff39e10000000a114084/frameset.htm
and,
http://help.sap.com/saphelp_nw2004s/helpdata/en/de/cf853f11ed0617e10000000a114084/frameset.htm
regards
Juan

Enqueue Server Lock Table

Hi,
Is there a way to manually release through Visual Admin for instance a locked resource on the Enqueue Server Lock Table?
Thanks in advance.

No.
Later versions have such, but not in VA.
Regards,
Benny

Enqueue server question

I was wondering i someone can help me by answering the following question:
In the enqueue server, do you receive a exception in the following scenarios?
1.You try to read a object/item which is already being read by other resource?
2.You try to write a object/item which is already being read by other resource?
3.You try to read a object/item which is already being written by other resource?
Thanks for your help

Hi John,
So, it depends e.g. on the type of lock that is acquired. For more information please check the <a href="http://help.sap.com/saphelp_nw04/helpdata/en/f4/670f9b9d62f94db4ea7361b34ea214/frameset.htm">Enqueue Server documentation</a>.
HTH!
-- Vladimir

LAN throughput requirements for replicated enqueue server

Hello to everyone.
We are currently running a SAP system on Netweaver 7.0 and plan to put in place a high availability solution based on replicated enqueue server.
I would like to have my enqueue server on one site and the replicated enqueue server on a another site, 50 km away from the first one.
What are the minimal network requirements to ensure the replication would work without any problem: throughput and overall latency ?
According to your experience, does separating the enqueue server and the replicated enqueue server with 50 km makes sense ?
Thanks for our help.
Best Regards to all.
Pascal.

Dear Pascal,
if you are using a standalone enqueue server, any latency between the enqueue server and the replication server will add to the enqueue response time. You can of course, still pipeline requests, but the response time of a single enqueue request will be increased by two times the network latency (since the enqueue server has to inform the replication server about what has to be altered in the replicated enqueue table, and wait for a response that this has been successfully replicated).
It highly depends on what you want to do if this will be a serious problem. However, enqueue functionality is but a small part of an application. I would not expect enqueue operations to add to more than a single digit percentage of the overall runtime.
Best Regards,
Tim

Enqueue Replication Server - Lock Table Size

Note : I think I had posted it wrongly under ABAP Development, hence request moderator to kindly delete this post. Thanks
Dear Experts,
If Enqueue Replication server is configured, can you tell me how to check the Lock Table size value, which we set using profile parameter enque/table_size.
If enque server is configured in the same host as CI, it can be checked using
ST02 --> Detail Analysis Menu --> Storage --> Shared Memory Detail --> Enque Table
As it is a Standalone Enqueue Server, I don't know where to check this value.
Thanking you in anticipation.
Best Regards
L Raghunahth

Hi
Raghunath
Check the following links
http://help.sap.com/saphelp_nw2004s/helpdata/en/37/a2e3ab344411d3acb00000e83539c3/content.htm
http://help.sap.com/saphelp_nw04s/helpdata/en/44/5efc11f3893672e10000000a114a6b/content.htm
Regards
Bhaskar

Enqueue Replication Server.

Dear Experts,
If Enqueue Replication server is configured, can you tell me how to check the Lock Table size value, which we set using profile parameter enque/table_size.
If enque server is configured in the same host as CI, it can be checked using
ST02 --> Detail Analysis Menu --> Storage --> Shared Memory Detail --> Enque Table
As it is a Standalone Enqueue Server, I don't know where to check this value.
Thanking you in anticipation.
Best Regards
L Raghunahth

Hello,
I haven't worked on Standalone Enque server, however its worth checking help.sap.com for this.
I did a bit of search found that monitoring can be done via ensmon
Check this link, Monitoring standalone Enqueue Server.
http://help.sap.com/saphelp_nw70/helpdata/EN/bb/84ba9b96e0a94f94ade7c73df93404/frameset.htm
Also,
there might be few interesting things in the Trace files.
http://help.sap.com/saphelp_nw70/helpdata/EN/cb/42f83df31a42fe8e266502cccdd9a0/frameset.htm
Regards,
Siddhesh
Edited by: Siddhesh Ghag on Sep 8, 2008 11:42 AM

Enqueue replication server does not terminate after failover

Hi,
We are trying to setup high availability of enqueue server where in we have running enqueue server on node-A and ERS on node-B all the time.
Whenever enqueue is stopped on node-A, it automatically failovers on node-B but after replication of lock table, enqueue does not terminate the ERS running on node-B and as a result our enqueue and ERS both keeps running on the same host (Failover node-B) which should not be the case.
We havenu2019t configured polling in that scenario SAP note-1018968 depicts the same however this is applicable only for version-640 and 700.
Ideally when enqueue server switches to node-B, it should terminate the ERS on the same node after replication and then HA software would take care of its restart on node -A.
We have ERS running of version 701; could anyone please let me know if the same behaviour is common for 701 version as well?
Or there is any additional configuration to be done to make it working.
Thanks in advance.
Cheers !!!
Ashish

Hi Naveed,
Stopping ERS is suppose to be taken care by SAP only and not the HA software.
Once ERS stops on node -B there would be a fault reported and as a result HA software will restart the ERS on node A.
Please refer to a section of SAP Note 1018968 - 'Enqueue replication server does not terminate after failover'
"Therefore, the cluster software must only organise the restart of the replication server and does not need to do anything for the shutdown."
Another blog about the same:
http://www.symantec.com/connect/blogs/veritas-cluster-server-sap
- After the successful lock table takeover, the Enqueue Replication Server will fault on this node (initiated by SAP). Veritas Cluster Server recognizes this failure and initiates a failover to a remaining node to create SAP Enqueue redundancy again. The Enqueue Replication Server will receive the complete Enqueue table from the Enqueue Server (SCS) and later Enqueue lock updates in a synchronous fashion.
So it is nothing about HA software, it is the SAP which should control ERS on node-B.
Cheers !!!
Ashish

Application Server not getting Started..

Hi Experts
I have recently installed the AS preview version. up till installation every thing was fine. but when starting the server i am waiting for the start up its still not up from last night. What things i should check..? or what might be the problem i have JDK 1.6 is this can be a problem.?
Thanks & Regards
Jeetendra

trc file: "D:\usr\sap\CE1\J00\work\dev_jstart", trc level: 1, release: "711"
* ACTIVE TRACE LEVEL           1
* ACTIVE TRACE COMPONENTS      All, egi
F
F [Thr 2808] Fri Jul 10 23:44:18 2009
F [Thr 2808] *** ERROR => SfCheckJeeVersion: Cannot find JEE application directory D:\usr\sap\CE1\J00\j2ee\cluster\apps. [sfxxmain.cpp 857]
F ********************************************************************************
F Java environment properties (D:\usr\sap\CE1\J00\work\jstart.jvm)
F    root directory    : D:\usr\sap\CE1\SYS\exe\jvm\NTI386\sapjvm_5.1.024/sapjvm_5
F    vendor            : SAP AG
F    version           : 1.5.0_14
F    cpu               : x86
F    java vm type      : server
F    java vm version   : 5.1.024
F    jvm library name : jvm.dll
F    library path      : D:\usr\sap\CE1\SYS\exe\jvm\NTI386\sapjvm_5.1.024\sapjvm_5\jre\bin\server;D:\usr\sap\CE1\SYS\exe\jvm\NTI386\sapjvm_5.1.024\sapjvm_5\jre\bin
F    executable path   : D:\usr\sap\CE1\SYS\exe\jvm\NTI386\sapjvm_5.1.024\sapjvm_5\bin
F ********************************************************************************
F    SAP extensions    : available
F ********************************************************************************
I [Thr 2808] MtxInit: 30002 0 2
trc file: "D:\usr\sap\CE1\J00\work\dev_jstart", trc level: 1, release: "711"
* ACTIVE TRACE LEVEL           1
* ACTIVE TRACE COMPONENTS      All, egi
F [Thr 2808] *** LOG => connected to Enqueue Server.
F [Thr 2808] *** WARNING => SfCMsClient::doAttach: Operation MS_CHANGE_IP failed (rc = 24 MSOP_EINVAL) [sfxxmsc.hpp 911]
F

Server does not start /jstart.exe stopped

Hi everyone! Unfortunately my jstart.exe stops abnormally.
Please, help.
This happed after changing the value in the field u2018Custom Number Of Nodesu2019 and restarting the server.
trc file: "D:\usr\sap\VW6\J00\work\dev_jstart", trc level: 1, release: "711"
ACTIVE TRACE LEVEL 1
ACTIVE TRACE COMPONENTS All, egi
F [Thr 744] *** LOG => connected to Enqueue Server.
F [Thr 744] *** LOG => connected to Message Server.
F [Thr 744] *** LOG => Starting run level 1.
F
F [Thr 744] Tue Oct 06 13:29:13 2009
F [Thr 744] *** ERROR => SfICreateFiElem: FiInit(JSF-FI-BRSESS, 1, 32) failed (rc = 6 invalid argument) [jsfxxsbase.c 1935]
F [Thr 744] *** ERROR => SfEInternalError: SfCInstanceManager::createDynShm: SfCreateDynShm failed (rc = 1 general error) [sfxxinst.hpp 566]
F [Thr 744] *** LOG => Instance state is "Not started" (STARTING @ 0, INACTIVE).
F [Thr 744] *** LOG => Instance state is "Some processes running" (RUNNING @ 0, INACTIVE).
Edited by: Sergey Talchuk on Oct 6, 2009 2:29 PM

Hi Tobias,
1. NW was stopped via SAPMMC console
2. Custom Number of Server Nodes field value was changed to 2 in configtool
3. NW was successfully started and stopped via SAPMMC console
4. Custom Number of Server Nodes field value was changed to N/A (to get the previous config and since the field does not allow empty values.)
5. As the result the issue above occured (starting/restarting did not help)
Thank you
Unfortunatelly default trace is not updated. Start Up procedure stops very quickly (after about 30 seconds)
Jstart.exe stops after 04 sec elapsed time.
Edited by: Sergey Talchuk on Oct 6, 2009 4:39 PM

Rebuild our XI application server from Single stack to dual stack

Hello,
We currently have an XI landscape with two application servers, the CI is of course a dual stack system, however the two app servers are single stacked, however we would like to make the two app servers into DUAL STACKs, my first guess was to rebuild the two apps from scratch and reinstall them as a dual stack apps. My Q is:
First: Do we need to rebuild both app servers, or can we make a change to the app servers to modify them to become dual stacked
Second: If we do need to rebuild both these apps, is there a specific document available to do this on Market place for installing a Dual stack app servers with PI?
Thanks in advance.
Sam
<Moved from SAP PI Forum>
Edited by: Prateek Raj Srivastava on May 13, 2010 12:27 PM

Hello,
Thank you all for your feedback,
Denny Liao, it is very interesting question you implied, we do have a J2EE directory created under the /usr/sap/SID/D30 directory:
/usr/sap/XQ9/D30
mqaapz28:xq9adm 13% ls -ltr
total 36
drwxr-xr-x 7 xq9adm sapsys 96 Aug 24 2009 igs
drwxr-xr-x 9 xq9adm sapsys 1024 Aug 24 2009 j2ee
drwxr-xr-x 2 xq9adm sapsys 1024 Nov 11 2009 sec
drwxr-xr-x 3 xq9adm sapsys 1024 Nov 24 10:48 log
obviously this app server does not have any (jlaunch/jcontrol process running) therefore it is not running as dual stacked. but interestingly enough I do see logs in the
/usr/sap/XQ9/D30/j2ee/cluster/server0/log directory created at the time of the initial install. and under:
/usr/sap/XQ9/D30/j2ee/cluster
mqaapz28:xq9adm 29% ls -ltr
total 30
drwxr-xr-x 2 xq9adm sapsys 1024 Aug 24 2009 bootstrap
-rw-rr 1 xq9adm sapsys 39 Aug 24 2009 version.bin
-rw-rr 1 xq9adm sapsys 6339 Aug 24 2009 instance.properties.vmprop
-rw-rr 1 xq9adm sapsys 3676 Aug 26 2009 instance.properties
drwxr-xr-x 7 xq9adm sapsys 1024 Aug 26 2009 dispatcher
drwxr-xr-x 11 xq9adm sapsys 1024 Aug 26 2009 server0
as per the note you mentioned above (741289 ) this explains how to recover a lost J2EE parameter setup, I am guessing this can be simply followed and re-enable the app server to run as a dual stack.
also my system information for the J2EE on the CI is:
System XQ9
Find other systems in SLD... Message Server
Host: mcsapxq9j
Port: 3924
Enqueue Server
Host: mcsapxq9j
Port: 3224
Database
Name: XQ9
Host: mcsapxq9dbx
Type: Oracle (Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 - 64bit Production With the Partitioning and Data Mining options)
Software Components all components...
Name Version Applied
sap.com/SAP-JEECOR 7.00 SP21 (1000.7.00.21.0.20091214121410) 20100506125119
sap.com/SAP-JEE 7.00 SP21 (1000.7.00.21.0.20091214121301) 20100506124943
Licenses
Installation Number *** not yet assigned ***
System Number *** not yet assigned ***
Software Product Days Until Expiry
Download system configuration
Instance mqacsz27_XQ9_30 All processes running
Host: mqacsz27
OS: SunOS (sparcv9) 5.10
dispatcher Running
VM system properties...
PID: 21384
Name: Java HotSpot(TM) 64-Bit Server VM
Vendor: Sun Microsystems Inc.
Version: 1.4.2_21-b03
VM Parameters
Cluster
Node ID: 301932700
Kernel Version: 7.00 PatchLevel 76340.450
HTTP Port: 53000
HTTPS Port: 53001
P4 Port: 53004
Telnet Port: 53008
Info for crashes of this node
server0 Running
VM system properties...
PID: 21394
Name: Java HotSpot(TM) 64-Bit Server VM
Vendor: Sun Microsystems Inc.
Version: 1.4.2_21-b03
VM Parameters
Cluster
Node ID: 301932750
Kernel Version: 7.00 PatchLevel 76340.450
Info for crashes of this node
SDM Running
VM
PID: 21400
SDM Port: 53018
So: besides setting up the parameters in the above Note and consider the Load balancing, as there any other major setups required to start this app server as a dual stacked instance?
Thanks in advance.
SAM
Edited by: SAM_ONE on May 14, 2010 3:45 AM
Edited by: SAM_ONE on May 14, 2010 3:55 AM

Enqueue replication service in Netweaver 7.1 (HA setup)

Hi,
I've setup a ERS instance along with an ASCS on my new Netweaver 7.1 installation for HA. I have a remote app server running on host B with the ASCS, Database and ERS on host A.
When I shutdown the ASCS, the ERS no longer works (ensmon crashes), but before everything was ok:
get replinfo request executed successfully
Replication is enabled in server, repl. server is connected
Replication is active
I also tested with enqt and I am not seeing the behavior describe by the documentation (enqt hangs when the ASCS is shutdown and recovers when ASCS is back up).
What I don't understand, is that nothing in the applications servers seems to indication that another enqueue server exists; other than the 3 parameters:
enque/process_location = REMOTESA
DEFAULT.PFL:enque/serverhost = hostA
DEFAULT.PFL:enque/serverinst = 81 (system number of the ASCS)
DEFAULT.PFL:enque/deque_wait_answer = TRUE
Any ideas?
Thanks
-Cyril

Hello,
What do your logs say ?
Has any configuration been changed ?
Regards,
Siddhesh

Enqueue Server

Similar Messages

Maybe you are looking for