GENERAL ERROR: If asynchronous I/O is enabled, the bpbkar process may hang and can not be killed, requiring a reboot of the system in order to recover.
| Article:TECH57079 | | | Created: 2008-01-25 | | | Updated: 2009-01-27 | | | Article URL http://www.symantec.com/docs/TECH57079 |
Problem
GENERAL ERROR: If asynchronous I/O is enabled, the bpbkar process may hang and can not be killed, requiring a reboot of the system in order to recover.
Solution
Overview: On HP-UX 11.11, on rare occasions,
the bpbkar process has been seen to hang requiring a reboot of the system
to recover if asynchronous I/O is enabled.
Troubleshooting:
The bpbkar will report an error reading a file:
16:51:48.621 [277] <16> bpbkar process_file: ERR - Read error at byte 0 reading 23552 bytes in file /BCV/oracle/arch1234.dbf. Errno = -1:
Then, nothing else for that pid.
A truss of the active bpbkar process may show many of the following type messages:
aio_error64(0x400658d0) ........................ ERR#22 EINVAL
Resolution:
It is possible to resolve this issue by creating the file /usr/openv/netbackup/AIO_READS_MAX with content of the number 1 to disable asynchronous I/O.
echo 1 > /usr/openv/netbackup/AIO_READS_MAX
Note: Be aware this can impact the speed of the backups.
Troubleshooting:
The bpbkar will report an error reading a file:
16:51:48.621 [277] <16> bpbkar process_file: ERR - Read error at byte 0 reading 23552 bytes in file /BCV/oracle/arch1234.dbf. Errno = -1:
Then, nothing else for that pid.
A truss of the active bpbkar process may show many of the following type messages:
aio_error64(0x400658d0) ........................ ERR#22 EINVAL
Resolution:
It is possible to resolve this issue by creating the file /usr/openv/netbackup/AIO_READS_MAX with content of the number 1 to disable asynchronous I/O.
echo 1 > /usr/openv/netbackup/AIO_READS_MAX
Note: Be aware this can impact the speed of the backups.
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Legacy ID
297056
Article URL http://www.symantec.com/docs/TECH57079
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