Sunday 26 July 2020

ORA-27300: OS system dependent operation:fork failed with status:

Scenario Preview :

we have 2 node grid 12c . After upgrade unable to start instance on node1 so after check alertlog file we found some error below after troubleshooting  found doc (Doc ID 1546393.1) and increases value at OS level.

Operating System : SLES 12 SP4

Error:

ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn3
Process m000 died, see its trace file

alert_SMRPLM1.log

srv1:/u01/app/oracle/diag/rdbms/smrplm/SMRPLM1/trace # tail -1000f alert_SMRPLM1.log
NOTE: Loaded library: /opt/oracle/extapi/64/asm/orcl/1/libasm.so
Sun Jul 26 20:53:23 2020
Process startup failed, error stack:
Sun Jul 26 20:53:24 2020
Errors in file /u01/app/oracle/diag/rdbms/smrplm/SMRPLM1/trace/SMRPLM1_psp0_6541.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn3
Process m000 died, see its trace file
Sun Jul 26 20:53:26 2020
Process startup failed, error stack:
Sun Jul 26 20:53:26 2020
Errors in file /u01/app/oracle/diag/rdbms/smrplm/SMRPLM1/trace/SMRPLM1_psp0_6541.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn5
Process m000 died, see its trace file
Sun Jul 26 20:53:46 2020
Instance reconfiguration: current system load 19 (hiload)
Sun Jul 26 20:53:52 2020
Reconfiguration started (old inc 2, new inc 4)
List of instances (total 2) :
 1 2
New instances (total 1) :
 2
My inst 1
Sun Jul 26 20:54:09 2020
 Global Resource Directory frozen
Starting background process RSMN
Sun Jul 26 20:54:09 2020
Process startup failed, error stack:
Sun Jul 26 20:54:09 2020
Errors in file /u01/app/oracle/diag/rdbms/smrplm/SMRPLM1/trace/SMRPLM1_psp0_6541.trc:
ORA-27300: OS system dependent operation:fork failed with status: 11
ORA-27301: OS failure message: Resource temporarily unavailable
ORA-27302: failure occurred at: skgpspawn3
Sun Jul 26 20:54:10 2020
NOTE: ASMB connected to ASM instance +ASM1 osid: 6613 (Flex mode; client id 0x10001)
Sun Jul 26 20:54:10 2020
 Communication channels reestablished
Sun Jul 26 20:54:10 2020
NOTE: initiating MARK startup
Sun Jul 26 20:54:10 2020
 Master broadcasted resource hash value bitmaps
 Non-local Process blocks cleaned out
Process RSMN died, see its trace file
 LMS 0: 0 GCS shadows cancelled, 0 closed, 0 Xw survived
 Set master node info
 Submitted all remote-enqueue requests
 Dwn-cvts replayed, VALBLKs dubious
 All grantable enqueues granted
Sun Jul 26 20:54:10 2020
 Post SMON to start 1st pass IR
 Submitted all GCS remote-cache requests
Sun Jul 26 20:54:11 2020
Errors in file /u01/app/oracle/diag/rdbms/smrplm/SMRPLM1/trace/SMRPLM1_ora_6432.trc:
ORA-00443: background process "RSMN" did not start
Sun Jul 26 20:54:11 2020
USER (ospid: 6432): terminating the instance due to error 450
Sun Jul 26 20:54:14 2020
Instance terminated by USER, pid = 6432

**********************************************************************


srv1:~ # crsctl status resource -t
--------------------------------------------------------------------------------
Name           Target  State        Server                   State details
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.ASMNET1LSNR_ASM.lsnr
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.CRS.dg
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.DATA.dg
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.FRA.dg
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.LISTENER.lsnr
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.net1.network
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
ora.ons
               ONLINE  ONLINE       srv1                     STABLE
               ONLINE  ONLINE       srv2                     STABLE
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.LISTENER_SCAN1.lsnr
      1        ONLINE  ONLINE       srv2                     STABLE
ora.LISTENER_SCAN2.lsnr
      1        ONLINE  ONLINE       srv1                     STABLE
ora.LISTENER_SCAN3.lsnr
      1        ONLINE  ONLINE       srv1                     STABLE
ora.MGMTLSNR
      1        ONLINE  ONLINE       srv1                     169.254.185.74 192.1
                                                             68.10.1,STABLE
ora.asm
      1        ONLINE  ONLINE       srv1                     Started,STABLE
      2        ONLINE  ONLINE       srv2                     Started,STABLE
ora.cvu
      1        ONLINE  ONLINE       srv1                     STABLE
ora.mgmtdb
      1        ONLINE  ONLINE       srv1                     Open,STABLE
ora.qosmserver
      1        ONLINE  ONLINE       srv2                     STABLE
ora.scan1.vip
      1        ONLINE  ONLINE       srv2                     STABLE
ora.scan2.vip
      1        ONLINE  ONLINE       srv1                     STABLE
ora.scan3.vip
      1        ONLINE  ONLINE       srv1                     STABLE
ora.smrplm.db
      1        ONLINE  OFFLINE                               Instance Shutdown,ST
                                                             ABLE
      2        ONLINE  ONLINE       srv2                     Open,HOME=/u01/app/o
                                                             racle/product/12.1.0
                                                             /dbhome_1,STABLE
ora.smrplm.pretafplm.svc
      1        ONLINE  ONLINE       srv2                     STABLE
ora.smrplm.pretafplm_preconnect.svc
      1        ONLINE  OFFLINE                               STABLE
ora.srv1.vip
      1        ONLINE  ONLINE       srv1                     STABLE
ora.srv2.vip
      1        ONLINE  ONLINE       srv2                     STABLE
--------------------------------------------------------------------------------

Solution :

Following  ORA-27300: OS System Dependent Operation:fork Failed With Status: 11 (Doc ID 1546393.1)



Increase the nporc value on file  /etc/security/limits.conf

oracle soft nproc 131072

grid soft nproc 131072

Also check  value on /etc/sysctl.conf file :

srv1:/home/oracle # sysctl -w kernel.pid_max=139264

kernel.pid_max = 139264

sysctl -p

oracle@srv1:~> sqlplus / as sysdba

SQL*Plus: Release 12.1.0.2.0 Production on Sun Jul 26 21:04:50 2020

Copyright (c) 1982, 2014, Oracle.  All rights reserved.

Connected to an idle instance.

SQL> startup
ORACLE instance started.

Total System Global Area 2147483648 bytes
Fixed Size                  2926472 bytes
Variable Size            1140852856 bytes
Database Buffers          989855744 bytes
Redo Buffers               13848576 bytes
Database mounted.
Database opened.
SQL>

oracle@srv1:~> srvctl status database -d SMRPLM
Instance SMRPLM1 is running on node srv1
Instance SMRPLM2 is running on node srv2

Still in some case i have seen error occurred set value below at OS file  
 # cat /etc/systemd/system.conf set value DefaultTasksMax=65535

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