100% cpu usage on CentOS/RHEL 6

[Mark Thornton]

On 02/07/12 14:45, Amol Kulkarni wrote:
> Hi,
>
> I have a java app running on CentOS 6.0. It always runs in background via
> cron. Sometimes this app goes into wait state while using 100% cpu.
>
> My java version is :
>
>      java version "1.6.0_17"
>      OpenJDK Runtime Environment (IcedTea6 1.7.4) (rhel-1.21.b17.el6-x86_64)
>      OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)
>
> Other symptoms are :
>
> a. One thread of the process seems to be in a loop waiting for something.
> When traced using strace, it shows following o/p continuously :
>
>>      futex(0x7fb8000ac728, FUTEX_WAKE_PRIVATE, 1) = 0
>>      futex(0x7fb8000ac754, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME,

Could it be related to this:
https://bugzilla.kernel.org/show_bug.cgi?id=32922

Mark Thornton