Maybe a thread dump would be useful if you still have some instance running
on 7.7
On Wed, Feb 27, 2019 at 7:28 AM Lukas Weiss <lukas.we...@raiffeisen.it>
wrote:
> I can confirm this. Downgrading to 7.6.0 solved the issue.
> Thanks for the hint.
>
>
>
> Von: "Joe Obernberger" <joseph.obernber...@gmail.com>
> An: solr-user@lucene.apache.org, "Lukas Weiss"
> <lukas.we...@raiffeisen.it>,
> Datum: 27.02.2019 15:59
> Betreff: Re: High CPU usage with Solr 7.7.0
>
>
>
> Just to add to this. We upgraded to 7.7.0 and saw very large CPU usage
> on multi core boxes - sustained in the 1200% range. We then switched to
> 7.6.0 (no other configuration changes) and the problem went away.
>
> We have a 40 node cluster and all 40 nodes had high CPU usage with 3
> indexes stored on HDFS.
>
> -Joe
>
> On 2/27/2019 5:04 AM, Lukas Weiss wrote:
> > Hello,
> >
> > we recently updated our Solr server from 6.6.5 to 7.7.0. Since then, we
> > have problems with the server's CPU usage.
> > We have two Solr cores configured, but even if we clear all indexes and
> do
> > not start the index process, we see 100 CPU usage for both cores.
> >
> > Here's what our top says:
> >
> > root@solr:~ # top
> > top - 09:25:24 up 17:40, 1 user, load average: 2,28, 2,56, 2,68
> > Threads: 74 total, 3 running, 71 sleeping, 0 stopped, 0 zombie
> > %Cpu0 :100,0 us, 0,0 sy, 0,0 ni, 0,0 id, 0,0 wa, 0,0 hi, 0,0 si,
> > 0,0 st
> > %Cpu1 :100,0 us, 0,0 sy, 0,0 ni, 0,0 id, 0,0 wa, 0,0 hi, 0,0 si,
> > 0,0 st
> > %Cpu2 : 11,3 us, 1,0 sy, 0,0 ni, 86,7 id, 0,7 wa, 0,0 hi, 0,3 si,
> > 0,0 st
> > %Cpu3 : 3,0 us, 3,0 sy, 0,0 ni, 93,7 id, 0,3 wa, 0,0 hi, 0,0 si,
> > 0,0 st
> > KiB Mem : 8388608 total, 7859168 free, 496744 used, 32696
> > buff/cache
> > KiB Swap: 2097152 total, 2097152 free, 0 used. 7859168 avail
> Mem
> >
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+
> COMMAND
> > P
> > 10209 solr 20 0 6138468 452520 25740 R 99,9 5,4 29:43.45 java
> > -server -Xms1024m -Xmx1024m -XX:NewRatio=3 -XX:SurvivorRatio=4
> > -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=8
> > -XX:+UseConcMarkSweepGC -XX:ConcGCThreads=4 + 24
> > 10214 solr 20 0 6138468 452520 25740 R 99,9 5,4 28:42.91 java
> > -server -Xms1024m -Xmx1024m -XX:NewRatio=3 -XX:SurvivorRatio=4
> > -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=8
> > -XX:+UseConcMarkSweepGC -XX:ConcGCThreads=4 + 25
> >
> > The solr server is installed on a Debian Stretch 9.8 (64bit) on Linux
> LXC
> > dedicated Container.
> >
> > Some more server info:
> >
> > root@solr:~ # java -version
> > openjdk version "1.8.0_181"
> > OpenJDK Runtime Environment (build 1.8.0_181-8u181-b13-2~deb9u1-b13)
> > OpenJDK 64-Bit Server VM (build 25.181-b13, mixed mode)
> >
> > root@solr:~ # free -m
> > total used free shared buff/cache
> > available
> > Mem: 8192 484 7675 701 31 7675
> > Swap: 2048 0 2048
> >
> > We also found something strange if we do an strace of the main process,
> we
> > get lots of ongoing connection timeouts:
> >
> > root@solr:~ # strace -F -p 4136
> > strace: Process 4136 attached with 48 threads
> > strace: [ Process PID=11089 runs in x32 mode. ]
> > [pid 4937] epoll_wait(139, <unfinished ...>
> > [pid 4936] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4909] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4618] epoll_wait(136, <unfinished ...>
> > [pid 4576] futex(0x7ff61ce66474, FUTEX_WAIT_PRIVATE, 1, NULL
> <unfinished
> > ...>
> > [pid 4279] futex(0x7ff61ce62b34, FUTEX_WAIT_PRIVATE, 2203, NULL
> > <unfinished ...>
> > [pid 4244] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4227] futex(0x7ff56c71ae14, FUTEX_WAIT_PRIVATE, 2237, NULL
> > <unfinished ...>
> > [pid 4243] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4228] futex(0x7ff5608331a4, FUTEX_WAIT_PRIVATE, 2237, NULL
> > <unfinished ...>
> > [pid 4208] futex(0x7ff61ce63e54, FUTEX_WAIT_PRIVATE, 5, NULL
> <unfinished
> > ...>
> > [pid 4205] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4204] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4196] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4195] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4194] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4193] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4187] restart_syscall(<... resuming interrupted restart_syscall
> ...>
> > <unfinished ...>
> > [pid 4180] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4179] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4177] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4174] accept(133, <unfinished ...>
> > [pid 4173] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4172] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4171] restart_syscall(<... resuming interrupted restart_syscall
> ...>
> > <unfinished ...>
> > [pid 4165] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4164] futex(0x7ff61c1f5054, FUTEX_WAIT_PRIVATE, 3, NULL
> <unfinished
> > ...>
> > [pid 4163] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4162] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4161] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4160] futex(0x7ff623d52c20,
> > FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 0, NULL, 0xffffffff
> > <unfinished ...>
> > [pid 4159] futex(0x7ff61c1e9d54, FUTEX_WAIT_PRIVATE, 7, NULL
> <unfinished
> > ...>
> > [pid 4158] futex(0x7ff61c1b7f54, FUTEX_WAIT_PRIVATE, 15, NULL
> <unfinished
> > ...>
> > [pid 4157] futex(0x7ff61c1b5554, FUTEX_WAIT_PRIVATE, 19, NULL
> <unfinished
> > ...>
> > [pid 4156] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4155] restart_syscall(<... resuming interrupted futex ...>
> > <unfinished ...>
> > [pid 4153] futex(0x7ff61c06c754, FUTEX_WAIT_PRIVATE, 7, NULL
> <unfinished
> > ...>
> > [pid 4152] futex(0x7ff61c06ab54, FUTEX_WAIT_PRIVATE, 3, NULL
> <unfinished
> > ...>
> > [pid 4151] futex(0x7ff61c068f54, FUTEX_WAIT_PRIVATE, 7, NULL
> <unfinished
> > ...>
> > [pid 4150] futex(0x7ff61c067354, FUTEX_WAIT_PRIVATE, 7, NULL
> <unfinished
> > ...>
> > [pid 4148] futex(0x7ff61c024a54, FUTEX_WAIT_PRIVATE, 403, NULL
> > <unfinished ...>
> > [pid 4165] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection
> > timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564856, tv_nsec=849859736}, 0xffffffff <unfinished ...>
> > [pid 4147] futex(0x7ff61c022e54, FUTEX_WAIT_PRIVATE, 415, NULL
> > <unfinished ...>
> > [pid 4146] futex(0x7ff61c021254, FUTEX_WAIT_PRIVATE, 397, NULL
> > <unfinished ...>
> > [pid 4145] futex(0x7ff61c01f654, FUTEX_WAIT_PRIVATE, 405, NULL
> > <unfinished ...>
> > [pid 4144] futex(0x7ff61c00e354, FUTEX_WAIT_PRIVATE, 1, NULL
> <unfinished
> > ...>
> > [pid 4136] futex(0x7ff624b729d0, FUTEX_WAIT, 4144, NULL <unfinished
> ...>
> > [pid 4165] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed
> > out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564856, tv_nsec=900162344}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564856, tv_nsec=950365105}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=586325}, 0xffffffff) = -1 ETIMEDOUT
> (Connection
> > timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=50791977}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=100997890}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=151206817}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=201402531}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=251616284}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=301813556}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=352036802}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=402239182}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=452439835}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=502635489}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=552844020}, 0xffffffff <unfinished ...>
> > [pid 4156] <... restart_syscall resumed> ) = -1 ETIMEDOUT (Connection
> > timed out)
> > [pid 4156] futex(0x7ff61c1aba28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4156] futex(0x7ff61c1aba54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564858, tv_nsec=506449064}, 0xffffffff <unfinished ...>
> > [pid 4165] <... futex resumed> ) = -1 ETIMEDOUT (Connection timed
> > out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=603013734}, 0xffffffff) = -1 ETIMEDOUT
> > (Connection timed out)
> > [pid 4165] futex(0x7ff61c1f7a28, FUTEX_WAKE_PRIVATE, 1) = 0
> > [pid 4165] futex(0x7ff61c1f7a54, FUTEX_WAIT_BITSET_PRIVATE, 1,
> > {tv_sec=32564857, tv_nsec=653149664}, 0xffffffff^Cstrace: Process 4136
> > detached
> > strace: Process 4144 detached
> > strace: Process 4145 detached
> > strace: Process 4146 detached
> > strace: Process 4147 detached
> > strace: Process 4148 detached
> > strace: Process 4150 detached
> > strace: Process 4151 detached
> > strace: Process 4152 detached
> > strace: Process 4153 detached
> > ....
> >
> >
> > Could you help us to determine what's wrong with our setup?
> >
> > Thank you very much,
> >
> > Kind regards
> > Lukas Weiss
> >
> > ---
> > This email has been checked for viruses by AVG.
> > https://www.avg.com
> >
>
>
