NetVault service won't start, fails to allocate shared memory
2016. 2. 22. 22:16 from Data Protection/NetVault BackupThe best way to determine why NVPMGR cannot start is to enable trace and have it examined by Support:
- run nvconfigurator > General > check "Generate debugging files" > Apply
- try to start NVBU using the nvconfigurator > Service tab or ../netvault/bin/nvpmgr startup command in CLI.
- once the service fails to start send a zipped copy of the ../netvault/trace folder to Quest Support for them to identify the cause.
In the case of a failure to allocate shared memory, this could be due to the fact that the application had not been shutdown in a clean way, leaving orphaned nv processes.
These will occupy the share memory area on behalf of NetVault and prevent NVPMGR from allocating shared memory once again.
On Unix based Operating Systems type the following in a Terminal session:
ps -ef | grep nv [OR ps -aux | grep nv for MAC]
This will list all started NetVault processes as they all start with nv*.
Linux 에서 넷볼트 서비스 데몬이 죽을 때 !
로그가 없기 때문에 절때 확인할 방법 이 없다.
그럼 Linux 로그 확인 시 ..kb 와 근접한 로그는 있다.
물론 LInux 엔지니어 분이 해결 하셨다.
참조
https://support.software.dell.com/ko-kr/netvault-backup/kb/81701?kblang=en-US
ps -ef | grep nv [OR ps -aux | grep nv for MAC]
This will list all started NetVault processes as they all start with nv*.
문제점은 DBA 분이 해당 서버에 kernel.shmmax 값을 설정하기도 한다.
넷볼트에서도 kernel,shmmax 값을 어느정도 할당해야 하기 때문에 할당 값이 부족할 경우
넷볼트 데몬은 절때 가동되지 않는다. (아무리 수동적으로 올려도 안된다!)
kernel.shmmax 값을 다른 서버와 비교 하여 적당한 범위 값을 설정하여 문제점을 해결해 본다 .
sysctl.conf extract, calculated by me:
kernel.shmall = 1079204
kernel.shmmax = 4420419584
NetVault service won't start, fails to allocate shared memory (81701)
- 제목
- NetVault service won't start, fails to allocate shared memory
- 설명
- This article is a complementary article to the already existing solution #SOL78784 "NetVault service/processes will not start" which should also be checked.Trace shows NetVault fails to get shared memory:
2 SHM ??? 8940 26 0 141357704276 Create shared memory 'Global\NetVault_SharedMemory_EXCHANGE_0'
5 SHM ??? 8940 8 0 141357704276 shared memory name is already in use
5 SHM ??? 8940 10 0 141357704276 FALSE = ShmAllocate(0x00445CD0, 2048000)
0 PMGR ??? 8940 27 0 141357704276 failed to get shared memory for process manager
6 SYSTEM ??? 8940 20 0 141357704276 Logging 'Process 'nvpmgr' failed to get shared memory' to system logs
3 PMGR ??? 8940 35 0 141357704276 PmgrInitSharedMem return FALSE
0 PMGR ??? 8940 158 0 141357704276 Failed to initialize shared memory
2 PMGR ??? 8940 146 0 141357704276 FALSE = PmgrInitialize()
0 PMGR ??? 8940 2 1 141357704276 Failed to initialize giveup
5 PROCESS ??? 8940 13 0 141357704276 ProcCleanup(1) - NetVault service fails to start.
- 원인
- In order to successfully start the NetVault application, the NetVault parent process called NVPMGR (NetVault Process Manager) needs to be able to start.
In turn for NVPMGR to remain started the following must apply:
- NVPMGR must be able to successfully allocate shared memory for its process table which will be used to start and communicate with the other necessary Start of the Day (SOD) processes.
- Each SOD process must successfully start and remain started. - Hence when NVPMGR fails to start it could be due to:
- Failure to allocate Shared Memory to start the SOD processes
- OR if shared memory was successfully allocated a SOD process has encountered a problem. - 해결 방안
- The best way to determine why NVPMGR cannot start is to enable trace and have it examined by Support:In the case of a failure to allocate shared memory, this could be due to the fact that the application had not been shutdown in a clean way, leaving orphaned nv processes.
These will occupy the share memory area on behalf of NetVault and prevent NVPMGR from allocating shared memory once again.This will list all started NetVault processes as they all start with nv*.If the NetVault service doesn't start and you notice that there are few nv* processes returned by this command, and NVPMGRis missing, then this means the application has not exited in a clean manner (crashed)
and the NVPMGR was shutdown leaving other child nv processes lingering, commonly known as Zombies.
To resolve this you will have to kill them:If NetVault is still not operational after this, then trace will reveal the culprit.
Additionally you may want to look at SOL78784 "NetVault service/processes will not start" for other recommendations.Additionaly, check the following:2. No permission issue running the NetVault Process Manager service.If all fails, re-install the NetVault client but ensure that NetVault Backup database has been backed up. - 1. No anti-virus or firewall blocking the netvault services
- 1) Open a Terminal Session or Command Line
2) type: ps -ef | grep nv [OR ps -aux for MAC] [OR Open the Windows Task Manager and look for nv* processes]
3) This will list all nv* process that could have been left following a unclean shutdown of the application
4) Kill them as follows:
kill -9 PID [where PID is a number corresponding to the nvprocess id shown on the result of the ps -ef]
For Windows just right click on the processes in the Task Manager and select 'end process'
5) restart NetVault with : 'nvpmgr startup' [can be invoked from the ~netvault/bin directory if the above command isn't recognized.] - [On Windows the use of the Task Manager would be enough.]
- On Unix based Operating Systems type the following in a Terminal session:
ps -ef | grep nv [OR ps -aux | grep nv for MAC] - - run nvconfigurator > General > check "Generate debugging files" > Apply
- try to start NVBU using the nvconfigurator > Service tab or ../netvault/bin/nvpmgr startup command in CLI.
- once the service fails to start send a zipped copy of the ../netvault/trace folder to Quest Support for them to identify the cause.
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