MII Logon Error

[sidnooradarsh]

Hi,

We are on NW CE 7.1 EHP1 and MII 12.1 SP 7 build 47.

There are 300 plus users, some regular webservice calls to MII.

Recently, we encountered with situation where MII did not allow any users to login to application, it displayed an error saying "Logon limit exceeded. Please try again later" Since none of us were able to enter the application finally we were forced to re-start NW which eventually fixed the issue.

Then I checked for settings in AS Java Config tool -->Instance >Services>Security and found following properties set,

1) LoginModuleClassLoaders = blank nothing specified
2) LogonURL = /j_security_check
3) MaxUsersCount = 100000
4) ServiceStartupLockAttemptsInterval = 1000
5) ServiceStartupLockTimeLimit = 1800000
6) SessionExpirationPeriod = 100000000
7) SynchPermissionsWithDatabase = true
😎 VerifyLoginModulesOnDeploy = true
9) WriteSuccessfulLogonStatistics = false
10) forceCreateAllUserEntries = false
11) sessions_size = 200

With such large User Count of 1,000,000 set I don't think it was something to do with User count.

When MII came back up I found below error in NW logs

Message: Can not create shm web object. Possible out of shm free slots. Check the shared memory configuration 
Date: 2011-01-14 
Time: 22:02:08:831 
Category: com.sap.engine.session.runtime.http.HttpRuntimeSessionModel 
Location: com.sap.engine.session.runtime.http.HttpRuntimeSessionModel 
Application: sap.com/xappsxmiiear 
Thread: Thread[HTTP Worker [@1175508341],5,Dedicated_Application_Thread] 
Data Source: j2ee\cluster\server0\log\defaultTrace_00.trc 
Arguments:  
DSR Transaction: 38216e70205c11e09fdf001cc4eaf0be 
Message Code: com.sap.ASJ.ses.rt0001 
Session: 1200 
Transaction:  
User: est_tuber_t218 
Time Zone: 0-600 
CSN Component: BC-JAS-COR-SES 
DC Component: kernel.sda 
Correlation ID: 1428850000000003 
DSR Root Context ID: 38216E70205C11E09FDF001CC4EAF0BE 
DSR Connection: 38216e70205c11e09fdf001cc4eaf0be 
DSR Counter: 0 
Host: gpiptcxm01 
System: PR1 
Instance: J00 
Node: server0 
Log ID: 001CC4EAF0BE250C0000000800000B2C 

I am afraid we might face this issue again in future. so any suggestions/recommendations will be of great help.

Regards,

Adarsh

[Former Member]

Hello Ardash,

We saw this error today. Can you share anything about the issue? Has it returned? Have you changed anything to avoid?

Regards,

Aaron

[sidnooradarsh]

Hello Aron,

We have resolved this issue.

Open sapmmc sap management console, look for the entry called

"AS Java Shared Table Info"

it will give you the details of

"Sessions being used" "Sessions Peak Value" and "Max limit of sessions"

.

In our case the unclosed user sessions was hitting the max limit causing the above error. Users on our shopfloor never logoff from application instead they simply close the browser (hit on x button of browser) and when user closes browser without logging out then session created remains active in NW shared memory and each time they login and close without logging out a new entry will be added to shared memory and in addition we had the set user session timeout period to 2 business days so all these factors resulted in above issue.

Resolution:

1) Trained users to logoff from MII before closing the browser (which still most users don't follow )

2) Key thing we reduced the Session Expiration period to 8 hours.

 This setting can be done from  MII portal -->System Management --> System Administration --> SessionTimeOut

So what happens even if user don't logoff after 8 hours the session will expire automatically.

And if you still having issues with sessions then probably you can look forward to increase the max limit of shared memory

Hope this helps!!

Regards,

Adarsh