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Re: "Bad resume count detected" MaxDB 7.5

July 23, 2014, 9:41 am
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Hi Thorsten,

 

Thanks so much for this confirmation.  I expected this to be the problem.  The only thing I can't figure out is why it's happening now.  This is a restore of a working production system.  I guess it has to do with my platform which is now a 32-bit VM vs an ia64 physical server. Other than that, the OS, SAP and DB version are the same except for my recent DB upgrade in efforts to fix this issue.

 

Here is the call stack, If you can offer and more insight as to what might be the cause or possibly a way to fix this without upgrading to 7.6 it would be infinitely appreciated!

 

T127 Bad resume count detected:128

...

0: 0x0881bae8 eo670_CTraceStack +0x0028

1: 0x0883ba7d vabort +0x0039

2: 0x0884d8dd en56_StoreResumer +0x012d

3: 0x0884cf99 vresume +0x0105

4: 0x084475f1 bd20_ResumeOccupant +0x0041

5: 0x08444eb9 bd20UsePage +0x01e9

6: 0x0846c64e bd13GetNode +0x052a

7: 0x084523b3 b36nqual_from_tree +0x068f

8: 0x08437754 b02kb_select_rec +0x04f4

9: 0x0841f6a7 k75_fetch +0x08f3

10: 0x083b4589 k05functions +0x075d

11: 0x0816f197 a06lsend_mess_buf +0x0493

12: 0x0816ec29 a06ignore_rsend_mess_buf +0x0185

13: 0x08170b65 a06rsend_mess_buf +0x003d

14: 0x0829c2e5 a507select_part +0x0e95

15: 0x0829a4ca a507last_command_part +0x00c2

16: 0x0829225b a505most_execute +0x1313

17: 0x08290a4d a505loop_most_execute +0x0419

18: 0x0828a75a a501exec_with_change_rec +0x0836

19: 0x0828acb0 a501execute +0x031c

20: 0x08334a6f ak92analyze_messagetype +0x05eb

21: 0x083358dd a92_mode_analyzer +0x01cd

22: 0x0833a245 ak93one_command +0x0789

23: 0x08338dfd a93_user_commands +0x0485

24: 0x081556a1 ak91run_user_process +0x0125

25: 0x08155945 a91mainprogam_with_allocator +0x0041

26: 0x0858ba6a gg941CreateAllocatorAndCallMainprog +0x01f6

27: 0x081558e8 a91mainprogram +0x003c

28: 0x08861c50 en88_CallKernelTaskMain__FP9TASK_TYPE +0x01bc

29: 0x08862146 en88_CallCoroutineKernelTaskMain +0x002e

 

Thank you!

 

Chris

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Re: "Bad resume count detected" MaxDB 7.5

July 24, 2014, 9:33 am
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Chris,

your call stack looks indeed very similar and you are very likely facing the issue described in that PTS1208411.

 

"Appearance:
Kernel crashes with an error message 'Bad resume count detected'

Preconditions and circumstances:
Error occurs during normal operation

Workaround:
none

Solution:
Error was caused by a counter overrun error. A negative value used in combination with a modulo operation would lead to a negative array index. Now, signed values will be used instead of integers"

 

When this bug appeared some years ago, we had only seen rare cases and probably none in 7.5, however I cannot predict how often your specific VM system will be affected. At least it is odd that it would appear always at ca. 11 days after the system was recovered from backup.

You might want to test if this issue occurs repeatedly on the new server (without moving your productive system over, please just test), but I am hesitant to call this a feasible solution.

Sadly, there appears to be no workaround besides upgrading to 7.6, 7.7, 7.8 or 7.9, but due to its age and the effort involved there are no current plans for releasing a new version of 7.5.

 

Could you further clarify on why an upgrade to a newer version is not an option for you?

Thorsten

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Re: Cache_size parameter changes

July 24, 2014, 10:09 am
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Hi,

in general, the CacheMemorySize (or CACHE_SIZE in older releases) value does not change automatically except if:

1. the installed server memory size falls below the configured CacheMemorySize.

2. a MaxDB is installed (without importing the parameters from a backup) and no user interaction done to overwrite the calculated default value based on the servers memory configuration.

Thorsten

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Re: MaxDB Studio issue

July 30, 2014, 4:39 am
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Hi Deepak,

 

when starting Studio everything looks fine, but when I choose My Landscape, Servers and add a server name in the box I got immediately the error message:

User management exception: Unknown host

servername:7210 [servername], -709

 

But a  telnet servername 7210 works fine !

 

It's the first time using MaxDB Studio and I'm also not very familiar with MaxDB.

 

Regards,

  Werner


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Re: MaxDB Studio issue

July 30, 2014, 5:21 am
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Hi Werner,

 

On the MaxDB database host please check whether X-server is running or not.

You can start the X_server using the command

x_server start/ stop

 

 

Refer documentation http://maxdb.sap.com/doc/7_6/default.htm -> Glossary -> X Server

 

 

Regards,

Deepak Kori

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Re: MaxDB Studio issue

July 30, 2014, 5:37 am
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Hi Deepak,

 

are you really sure that my Studio on PC requires that x_server is running in the remote database located on a Linux host.

Acctualy the x_server is running on port 7299.

 

Due to the error message I don't think that Studio does even try to connect to the remote server.

Please be aware of my configuration, I installed MaxDB Studio on my PC without MaxDB database software. The databases are installed on a remote Linux server, which I can only reach by tunneling the connection via putty.

but the connection itself works, which was verified by telnet with port 7210.

 

I read something, that MaxDB Studio cannot run without any local database. Is this true ?

 

Thanks.

 

Regards,

  Werner


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Re: MaxDB Studio issue

July 30, 2014, 5:57 am
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Hi Werner,

 

are you really sure that my Studio on PC requires that x_server is running in the remote database located on a Linux host.

Acctualy the x_server is running on port 7299.

X-server should be running on Linix host.

 

In Database studio while connecting please use port 7299.

 

Regards,

Deepak Kori

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Re: How to change minimum data size of MaxDB while installing SAP ERP 6.0

July 30, 2014, 10:30 pm
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Hi Deepak,

 

I created these on three LVM logical volumes on Linux.

But while installing in "Create database instance" phase I got below error:

 

Error.png

Error in log file:

 

class com.sap.sdb.sllib.utils.DbCommand | <DBMException -24988 ERR_SQL SQL error

-902,I/O error

3,Database state: OFFLINE

6,Internal errorcode, Error code 9050 "disk_not_accessible"

20030,Formatting of data area failed>

 

What could be the reason behind this? is it because I used logical volumes instead of raw disks OR

the size of logical volumes?

 

I created 3 logical volumes. two of them with size 125GB each and one with 30 GB.

 

What should be the appropriate size of each volumes for minimum data size 240GB?

 

 

Regards,

Swap

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Re: How to change minimum data size of MaxDB while installing SAP ERP 6.0

July 31, 2014, 12:59 am
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Hi Swap,

 

Looks like logical volumes have issue and this has resulted into DB being offline.

 

Please make the database online & check the status of  data volumes

 

dbmcli -d <SID> -u control,control param_getvolsall

 

If possible attach sapinst_dev.log

 

Regards,

Deepak Kori

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Re: How to change minimum data size of MaxDB while installing SAP ERP 6.0

July 31, 2014, 1:26 am
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Hi,

 

let me suggest to look into the 'KnlMsg' log file (via Database Studio - or convert it manually from pseudo xml to text with e.g. from the database rundirectory 'protconv KnlMsg > knldiag'.

With any luck there is more info in that log file. Also, locate the Data Volumes on file system level and check if any volume has been created so far (probably not). The '902, I/O error' is quite generic and could mean anything from permission problems to 'file not found' (please make sure the path really exists, MaxDB does not create directories on OS level!).

 

Thorsten

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Max db 7.9 installation on windows

July 31, 2014, 2:08 am
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Hello all,

 

I am planning to set up max db 7.9 for netweaver as java 7.4 sp1 on window server 2008 r2 with 4gb ram, 400gb hdd.

 

Can anyone share  the installation steps for max db with hardware and software requirement.

 

 

 

thanks,

mahesh

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Re: Max db 7.9 installation on windows

July 31, 2014, 2:11 am
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Re: How to change minimum data size of MaxDB while installing SAP ERP 6.0

July 31, 2014, 2:52 am
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Hi,

 

I have attached sapinst_dev.log file

 

Please also check the output of this command.

 

sqdlpm 1>  dbmcli -d LPM -u control,control param_getvolsall

Error! Connection failed to node (local) for database LPM:

-24950,ERR_USRFAIL: User authorization failed

 

Thanks,

Swap

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Re: 500 (Internal Server Error) CreateTab ContentStorage, connect error SQLConn

August 1, 2014, 7:37 am
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We also got the same error.. Mot importantly if the DB is created manually  the SAP user must be created using the note (582765 - SAP Content Server cannot address database) and register the driver using the command odbcreg

 

Thanks.

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Re: How to change minimum data size of MaxDB while installing SAP ERP 6.0

August 4, 2014, 6:04 am
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Thanks Thorsten,

 

This issue is resolved now. As per your suggestion I checked knlmsg log file.

Error in this file told me that disk space is not enough. So, I increased

the disk space and it worked.

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server crash - db connection broken

August 4, 2014, 7:57 am
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Hello,

 

We had cold system reset after which sap won't start. In startdb.log or when I try to start db manually with dbmcli error message is:

Error! Connection failed to node mynode for database SID:

connection broken

 

How can debug what's wrong with the db, where to start?

 

Best Regards,

Sasha

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Re: server crash - db connection broken

August 4, 2014, 8:15 am
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Hi Sasa,

 

Firstly check whether all the filesystems are available and mounted.

Refer SAP note 803452 - MaxDB directories in UNIX clusters for failover

 

Regards,

Deepak Kori

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Re: LiveCache complete data backup on FILE is failing.

August 5, 2014, 12:20 pm
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Hi Samil

 

Permissions of niserverxxxxxxxxxxxxfiles are sdb:sdba only.

But still backup has been cancelled with error

 

Job started

Step 001 started (program RSDBAJOB, variant &0000000000438, user ID SAP*)

Execute logical command DBMCLI On host pspdscmq

Parameters:-d LC2 -n pspdlcq -uUTL -tpi SCQ -tpp no_longer_used -tpc LCA backup_start Back_up RECOVERY DATA AUT

OIGNORE

Please check file DBAHIST.PRT --> No header?

Error! Connection failed to node pspdlcq for database LC2:

tp error:

External program terminated with exit code 2

DBMCLI returned error status E

Job finished

 

Please help.

 

Thanks

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Re: LiveCache complete data backup on FILE is failing.

August 5, 2014, 1:10 pm
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Hi

 

Problem has been resolved as /usr/sap/SID got fulled. After making this directory free, data backup has finished successfully.

 

Thanks

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Re: server crash - db connection broken

August 5, 2014, 2:24 pm
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All checks with sapdb tools run fine. But still db cannot be started, error code 5.

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