We keep getting the following error popping up in the apache error log:
[error] (103)Software caused connection abort: cache: error returned while trying to return disk cached data
This error occurs at irregular intervals, but on average about 1-2 times every 10 minutes. Over the past 2 days the site has gone down several times, possibly because of this error.
The only other error that is popping up in the log is client denied by server configuration, which has occurred about 10 times over the past 2 days.
We're using Apache/2.2.14 (Ubuntu). Top returns:
top - 15:47:19 up 4:28, 2 users, load average: 0.36, 0.78, 1.32
Tasks: 95 total, 1 running, 94 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 0.2%sy, 0.0%ni, 99.2%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 3091660k total, 698416k used, 2393244k free, 58732k buffers
Swap: 492536k total, 31112k used, 461424k free, 52068k cached
Any ideas what might be causing this issue and how we might resolve it?
Best Answer
I've seen the error message:
before in two situations, both which involved file-system problems (as the message itself kindof implies) One was a situation where the partition holding the cache was full. the caches grow really fast, and well, it ended up filling the partition. The other time the filesystem itself was damaged.
The error implies that its a read problem, but it can be a write problem too.
Root cause: your filesystem
Proposed solution: Check the integrity of the filesystem, and if that checks out, move the cache to a bigger partition or bigger disk, and you should be okay.