Hi!
Recently I have installed Debian 8 (jessie) on a HP ProLiant DL360 G4
server (2 x Xeon 3 GHz; RAM 3 GiB ECC DDR 333 MHz; HP Smart Array 6i;
RAID1 72 GB with 2 x 72 GB SCSI Ultra 320 HDD). For some reasons
upgrade to Debian 9 is not an option at the moment.
$ uname -a
Linux myserver 3.16.0-4-amd64 #1 SMP Debian 3.16.43-2+deb8u2 (2017-06-26) x86_64 GNU/Linux
After a day or two of uptime the system freezes (network services not
working, users cannot login). On the console I can see kernel messages
as the following:
INFO: task jbd2/cciss!c0d0:297 blocked for more than 120 seconds
Not tainted 3.16.0-4-amd64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
INFO: task jbd2/cciss!c0d0:301 blocked for more than 120 seconds
Not tainted 3.16.0-4-amd64 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
The messages repeat a couple of times every 120 sec. Sometimes the
messages also mention other tasks, e.g. kworker, apache2.
As suggested on
https://www.blackmoreops.com/2014/09/22/linux-kernel-panic-issue-fix-hung_task_timeout_secs-blocked-120-seconds-problem/I tried to add the following in /etc/sysctl.conf
vm.dirty_background_ratio = 5
vm.dirty_ratio = 10
but to no avail.
Memory test did not find any problem with RAM. Testing partitions with
"fsck.ext2 -f -cc" did not show any problems either.
I tried to install newer kernel from jessie-backports:
$ sudo apt install -t jessie-backports linux-image-amd64
...
The following extra packages will be installed:
linux-base linux-image-4.9.0-0.bpo.3-amd64
...
but then booting stops at "Loading initial ramdisk".
Could someone give any advice on this issue, please?
-- rpr.