Michael Richardson <m...@sandelman.ca> wrote:
> Then, port 8080 stops responding. And also I see new connections just
> stall.
to be clear, this is what I mean:
oscar-serv03-[~] root 213 #netstat -tan
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address Foreign Address State
tcp 0 0 127.0.0.53:53 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN
tcp 0 0 192.168.2.13:22 192.168.2.3:56556 ESTABLISHED
tcp6 1 0 :::8080 :::* LISTEN
tcp6 0 0 :::22 :::* LISTEN
tcp6 699 0 192.168.2.9:8080 192.168.2.3:37404 ESTABLISHED
{192.168.2.3:37404 is an ssh port forward from my desktop.
I wish stupid ISP had IPv6}
The process is clearly too busy to bother calling accept(2).
htop says:
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
11266 tomcat 20 0 3746M 169M 21252 S 201. 4.3 7:31.82
/usr/lib/jvm/java-8-openjdk-amd64/bin/java
-Djava.util.logging.config.file=/var/lib/tomcat9/conf/logging.propert
11283 tomcat 20 0 3746M 169M 21252 R 100. 4.3 3:13.27
/usr/lib/jvm/java-8-openjdk-amd64/bin/java
-Djava.util.logging.config.file=/var/lib/tomcat9/conf/logging.propert
11285 tomcat 20 0 3746M 169M 21252 R 100. 4.3 3:13.77
/usr/lib/jvm/java-8-openjdk-amd64/bin/java
-Djava.util.logging.config.file=/var/lib/tomcat9/conf/logging.propert
...and a bunch of 0% threads.
oscar-serv03-[~] root 218 #strace -p 11266
strace: Process 11266 attached
futex(0x7fa28312b9d0, FUTEX_WAIT, 11273, NULL^Cstrace: Process 11266 detached
<detached ...>
oscar-serv03-[~] root 219 #strace -p 11283 2>&1 | sed 10q
strace: Process 11283 attached
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
sched_yield() = 0
...forever...
oscar-serv03-[~] root 220 #strace -p 11285 2>&1 | sed 10q
strace: Process 11285 attached
strace: [ Process PID=11285 runs in x32 mode. ]
^C
I guess some JIT codes to 32-bit rather than amd64 codes?
--
] Never tell me the odds! | ipv6 mesh networks [
] Michael Richardson, Sandelman Software Works | IoT architect [
] m...@sandelman.ca http://www.sandelman.ca/ | ruby on rails [
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