I have a java chat server program running in linux. And sometimes the fatal error below happens. I think this fatal error may be caused by OOM but I am not sure.

```
-------------------- crash log ---------------------------

#
# A fatal error has been detected by the Java Runtime Environment:
#
#  Internal Error (sharedRuntime.cpp:834), pid=17781, tid=140031174805248
#  fatal error: exception happened outside interpreter, nmethods and vtable stubs at pc 0x00007f5c1d05406f
#
# JRE version: Java(TM) SE Runtime Environment (8.0_45-b14) (build 1.8.0_45-b14)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.45-b02 mixed mode linux-amd64 compressed oops)
# Failed to write core dump. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# If you would like to submit a bug report, please visit:
#   http://bugreport.java.com/bugreport/crash.jsp
#

---------------  T H R E A D  ---------------

Current thread (0x00007f5bac160800):  JavaThread "nioEventLoopGroup-3-12" [_thread_in_Java, id=18017, stack(0x00007f5b8c5e8000,0x00007f5b8c6e9000)]

Stack: [0x00007f5b8c5e8000,0x00007f5b8c6e9000],  sp=0x00007f5b8c6e6150,  free space=1016k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V  [libjvm.so+0xaac99a]  VMError::report_and_die()+0x2ba
V  [libjvm.so+0x4f2de9]  report_fatal(char const*, int, char const*)+0x59
V  [libjvm.so+0x9ab5ba]  SharedRuntime::continuation_for_implicit_exception(JavaThread*, unsigned char*, SharedRuntime::ImplicitExceptionKind)+0x33a
V  [libjvm.so+0x914f1a]  JVM_handle_linux_signal+0x48a
V  [libjvm.so+0x90b493]  signalHandler(int, siginfo*, void*)+0x43
C  [libpthread.so.0+0xf100]
J 10415 C2 com.sun.crypto.provider.GCTR.doFinal([BII[BI)I (130 bytes) @ 0x00007f5c1e10c096 [0x00007f5c1e10be40+0x256]

---------------  P R O C E S S  ---------------

Java Threads: ( => current thread )
  0x00007f5bb00bb800 JavaThread "OkHttp Dispatcher" [_thread_blocked, id=16894, stack(0x00007f5bbd8c9000,0x00007f5bbd9ca000)]
  0x00007f5bc81cb000 JavaThread "RMI TCP Connection(38403)-192.241.201.147" daemon [_thread_in_native, id=16892, stack(0x00007f5b7d0b1000,0x00007f5b7d1b2000)]
  0x00007f5bb800e000 JavaThread "RMI TCP Connection(38400)-165.227.2.145" daemon [_thread_in_native, id=16891, stack(0x00007f5b8e4f4000,0x00007f5b8e5f5000)]
  0x00007f5bc82ba000 JavaThread "RMI TCP Connection(38404)-192.241.201.147" daemon [_thread_in_native, id=16885, stack(0x00007f5b7fedb000,0x00007f5b7ffdc000)]
  0x00007f5bc82d4000 JavaThread "RMI TCP Connection(idle)" daemon [_thread_blocked, id=16883, stack(0x00007f5b7d7b8000,0x00007f5b7d8b9000)]
  0x00007f5bb8019000 JavaThread "RMI TCP Connection(38396)-165.227.2.145" daemon [_thread_in_native, id=16882, stack(0x00007f5b808e5000,0x00007f5b809e6000)]
  0x00007f5bb00a9800 JavaThread "OkHttp Dispatcher" [_thread_blocked, id=16878, stack(0x00007f5b7d5b6000,0x00007f5b7d6b7000)]
  0x00007f5b98417800 JavaThread "OkHttp Dispatcher" [_thread_blocked, id=16877, stack(0x00007f5b8e9f9000,0x00007f5b8eafa000)]
  0x00007f5b98421000 JavaThread "OkHttp Dispatcher" [_thread_blocked, id=16876, stack(0x00007f5b805e2000,0x00007f5b806e3000)]
  0x00007f5b980fd800 JavaThread "OkHttp Dispatcher" [_thread_blocked, id=16787, stack(0x00007f5bbc6b7000,0x00007f5bbc7b8000)]
  0x00007f5bb00b3800 JavaThread "MonitoringThread-8" daemon [_thread_in_native, id=16771, stack(0x00007f5b7dabb000,0x00007f5b7dbbc000)]
  0x00007f5bb00b4800 JavaThread "MonitoringThread-7" daemon [_thread_in_native, id=16770, stack(0x00007f5b810ed000,0x00007f5b811ee000)]
  0x00007f5bb002d000 JavaThread "MonitoringThread-52" daemon [_thread_in_native, id=16763, stack(0x00007f5b8c7ea000,0x00007f5b8c8eb000)]
  0x00007f5bb001e000 JavaThread "MonitoringThread-6" daemon [_thread_in_native, id=16762, stack(0x00007f5b80ce9000,0x00007f5b80dea000)]
  0x00007f5bb0057800 JavaThread "MonitoringThread-5" daemon [_thread_in_native, id=16761, stack(0x00007f5b7ebc8000,0x00007f5b7ecc9000)]
  0x00007f5bb0098000 JavaThread "MonitoringThread-12" daemon [_thread_in_native, id=16757, stack(0x00007f5b7bfa0000,0x00007f5b7c0a1000)]
  0x00007f5bb00a8000 JavaThread "MonitoringThread-11" daemon [_thread_in_native, id=16756, stack(0x00007f5b806e3000,0x00007f5b807e4000)]
  0x00007f5bb0088800 JavaThread "MonitoringThread-12" daemon [_thread_in_native, id=16732, stack(0x00007f5b7fdda000,0x00007f5b7fedb000)]
  0x00007f5bb00c5000 JavaThread "MonitoringThread-11" daemon [_thread_in_native, id=16731, stack(0x00007f5b8e8f8000,0x00007f5b8e9f9000)]
  0x00007f5bb0096800 JavaThread "MonitoringThread-51" daemon [_thread_in_native, id=16648, stack(0x00007f5b8ecfc000,0x00007f5b8edfd000)]
  0x00007f5bb00ba800 JavaThread "MonitoringThread-5" daemon [_thread_in_native, id=16573, stack(0x00007f5b7ffdc000,0x00007f5b800dd000)]
  0x00007f5bb012a000 JavaThread "MonitoringThread-4" daemon [_thread_in_native, id=16572, stack(0x00007f5b7e1c2000,0x00007f5b7e2c3000)]
  0x00007f5bb00a3000 JavaThread "MonitoringThread-6" daemon [_thread_in_native, id=16535, stack(0x00007f5b7fcd9000,0x00007f5b7fdda000)]
  0x00007f5bb00a0800 JavaThread "MonitoringThread-5" daemon [_thread_in_native, id=16533, stack(0x00007f5b7dbbc000,0x00007f5b7dcbd000)]
  0x00007f5bb0129000 JavaThread "MonitoringThread-2" daemon [_thread_in_native, id=16374, stack(0x00007f5b8eafa000,0x00007f5b8ebfb000)]
  0x00007f5bb0128000 JavaThread "pool-2168-thread-2" [_thread_blocked, id=16373, stack(0x00007f5bbc4b5000,0x00007f5bbc5b6000)]
  0x00007f5bb0097800 JavaThread "MonitoringThread-1" daemon [_thread_in_native, id=16372, stack(0x00007f5b7f7d4000,0x00007f5b7f8d5000)]
  0x00007f5bb00f1000 JavaThread "pool-2168-thread-1" [_thread_blocked, id=16371, stack(0x00007f5b7f9d6000,0x00007f5b7fad7000)]
  0x00007f5bb00bf000 JavaThread "pool-2201-thread-2" [_thread_blocked, id=16251, stack(0x00007f5b7c5a6000,0x00007f5b7c6a7000)]
  0x00007f5bb00aa000 JavaThread "MonitoringThread-4" daemon [_thread_in_native, id=16233, stack(0x00007f5b828f4000,0x00007f5b829f5000)]
  0x00007f5bb00b7800 JavaThread "MonitoringThread-3" daemon [_thread_in_native, id=16232, stack(0x00007f5b800dd000,0x00007f5b801de000)]
  0x00007f5bb00ae800 JavaThread "pool-2174-thread-2" [_thread_blocked, id=16118, stack(0x00007f5b8c1e4000,0x00007f5b8c2e5000)]
  0x00007f5bb00a4800 JavaThread "pool-2174-thread-1" [_thread_blocked, id=16116, stack(0x00007f5bbd7c8000,0x00007f5bbd8c9000)]
  0x00007f5bb00e1000 JavaThread "pool-2201-thread-1" [_thread_blocked, id=16084, stack(0x00007f5b80fec000,0x00007f5b810ed000)]
  0x00007f5bb0108800 JavaThread "pool-2231-thread-1" [_thread_blocked, id=16082, stack(0x00007f5b815f2000,0x00007f5b816f3000)]
  0x00007f5bb00c0000 JavaThread "pool-2159-thread-2" [_thread_blocked, id=16080, stack(0x00007f5b82df9000,0x00007f5b82efa000)]
  0x00007f5bb00be000 JavaThread "pool-2159-thread-1" [_thread_blocked, id=16078, stack(0x00007f5b8c0e3000,0x00007f5b8c1e4000)]
  0x00007f5bb016a000 JavaThread "pool-2165-thread-2" [_thread_blocked, id=16064, stack(0x00007f5b8e3f3000,0x00007f5b8e4f4000)]
  0x00007f5bb00ec000 JavaThread "pool-2165-thread-1" [_thread_blocked, id=16062, stack(0x00007f5b8e7f7000,0x00007f5b8e8f8000)]
  0x00007f5bb00a7000 JavaThread "pool-2156-thread-2" [_thread_blocked, id=16004, stack(0x00007f5bbc7b8000,0x00007f5bbc8b9000)]
  0x00007f5bb0089800 JavaThread "pool-2156-thread-1" [_thread_blocked, id=16002, stack(0x00007f5bbd4c5000,0x00007f5bbd5c6000)]
  0x00007f5bb00c3800 JavaThread "pool-2171-thread-2" [_thread_blocked, id=16000, stack(0x00007f5bbd6c7000,0x00007f5bbd7c8000)]
  0x00007f5bb003a000 JavaThread "pool-2171-thread-1" [_thread_blocked, id=15998, stack(0x00007f5b7bc9d000,0x00007f5b7bd9e000)]
  0x00007f5bb00c1000 JavaThread "pool-2198-thread-2" [_thread_blocked, id=15995, stack(0x00007f5bbf5dc000,0x00007f5bbf6dd000)]
  0x00007f5bb010a800 JavaThread "pool-2180-thread-2" [_thread_blocked, id=15994, stack(0x00007f5bbf8df000,0x00007f5bbf9e0000)]
  0x00007f5bb0056000 JavaThread "pool-2198-thread-1" [_thread_blocked, id=15991, stack(0x00007f5b8c6e9000,0x00007f5b8c7ea000)]
  0x00007f5bb00ad000 JavaThread "pool-2180-thread-1" [_thread_blocked, id=15990, stack(0x00007f5b8c3e6000,0x00007f5b8c4e7000)]
  0x00007f5b98434800 JavaThread "pool-2250-thread-1" [_thread_blocked, id=15989, stack(0x00007f5bbc5b6000,0x00007f5bbc6b7000)]
  0x00007f5b98408800 JavaThread "pool-2247-thread-1" [_thread_blocked, id=15988, stack(0x00007f5bbd1c2000,0x00007f5bbd2c3000)]
  0x00007f5b9840c800 JavaThread "pool-2244-thread-1" [_thread_blocked, id=15987, stack(0x00007f5bbccbd000,0x00007f5bbcdbe000)]
  0x00007f5b98433000 JavaThread "pool-2241-thread-1" [_thread_blocked, id=15986, stack(0x00007f5b804e1000,0x00007f5b805e2000)]
  0x00007f5b98431800 JavaThread "pool-2238-thread-1" [_thread_blocked, id=15985, stack(0x00007f5bbc8b9000,0x00007f5bbc9ba000)]
  0x00007f5b98426000 JavaThread "pool-2235-thread-1" [_thread_blocked, id=15984, stack(0x00007f5b7eac7000,0x00007f5b7ebc8000)]
  0x00007f5b9840a000 JavaThread "pool-2232-thread-1" [_thread_blocked, id=15983, stack(0x00007f5b7e9c6000,0x00007f5b7eac7000)]
  0x00007f5b98438800 JavaThread "pool-2229-thread-1" [_thread_blocked, id=15982, stack(0x00007f5bbcfc0000,0x00007f5bbd0c1000)]
  0x00007f5b983fd800 JavaThread "pool-2226-thread-1" [_thread_blocked, id=15981, stack(0x00007f5b807e4000,0x00007f5b808e5000)]
  0x00007f5b98404800 JavaThread "pool-2223-thread-1" [_thread_blocked, id=15980, stack(0x00007f5b80dea000,0x00007f5b80eeb000)]
  0x00007f5b9814f000 JavaThread "pool-2220-thread-1" [_thread_blocked, id=15979, stack(0x00007f5b80ae7000,0x00007f5b80be8000)]
  0x00007f5b98436800 JavaThread "pool-2217-thread-1" [_thread_blocked, id=15978, stack(0x00007f5b7d6b7000,0x00007f5b7d7b8000)]
  0x00007f5b9825f800 JavaThread "pool-2214-thread-1" [_thread_blocked, id=15977, stack(0x00007f5b7f0cd000,0x00007f5b7f1ce000)]
  0x00007f5b98414000 JavaThread "pool-2211-thread-1" [_thread_blocked, id=15976, stack(0x00007f5b7e2c3000,0x00007f5b7e3c4000)]
  0x00007f5b9841f000 JavaThread "pool-2208-thread-1" [_thread_blocked, id=15975, stack(0x00007f5b8ebfb000,0x00007f5b8ecfc000)]
  0x00007f5b98563800 JavaThread "pool-2205-thread-1" [_thread_blocked, id=15974, stack(0x00007f5bbd3c4000,0x00007f5bbd4c5000)]
  0x00007f5b9842c000 JavaThread "pool-2202-thread-1" [_thread_blocked, id=15973, stack(0x00007f5b802df000,0x00007f5b803e0000)]
  0x00007f5b98416000 JavaThread "pool-2199-thread-1" [_thread_blocked, id=15972, stack(0x00007f5bbcebf000,0x00007f5bbcfc0000)]
  0x00007f5b9842a800 JavaThread "pool-2196-thread-1" [_thread_blocked, id=15971, stack(0x00007f5b8e5f5000,0x00007f5b8e6f6000)]
  0x00007f5b98428800 JavaThread "pool-2193-thread-1" [_thread_blocked, id=15970, stack(0x00007f5b7fbd8000,0x00007f5b7fcd9000)]
  0x00007f5b9800e000 JavaThread "pool-2190-thread-1" [_thread_blocked, id=15969, stack(0x00007f5b7f6d3000,0x00007f5b7f7d4000)]
  0x00007f5b980fd000 JavaThread "pool-2187-thread-1" [_thread_blocked, id=15968, stack(0x00007f5bbc2b3000,0x00007f5bbc3b4000)]
  0x00007f5b98564800 JavaThread "pool-2184-thread-1" [_thread_blocked, id=15967, stack(0x00007f5bbcabb000,0x00007f5bbcbbc000)]
  0x00007f5b98401000 JavaThread "pool-2181-thread-1" [_thread_blocked, id=15966, stack(0x00007f5b7b798000,0x00007f5b7b899000)]
  0x00007f5b9840e000 JavaThread "pool-2178-thread-1" [_thread_blocked, id=15965, stack(0x00007f5bbc3b4000,0x00007f5bbc4b5000)]
  0x00007f5b9842e000 JavaThread "pool-2175-thread-1" [_thread_blocked, id=15964, stack(0x00007f5b8edfd000,0x00007f5b8eefe000)]
  0x00007f5b98567000 JavaThread "pool-2172-thread-1" [_thread_blocked, id=15963, stack(0x00007f5b7ddbe000,0x00007f5b7debf000)]
  0x00007f5b98419800 JavaThread "pool-2169-thread-1" [_thread_blocked, id=15962, stack(0x00007f5bbd2c3000,0x00007f5bbd3c4000)]
  0x00007f5b98044000 JavaThread "pool-2166-thread-1" [_thread_blocked, id=15961, stack(0x00007f5b8e6f6000,0x00007f5b8e7f7000)]
  0x00007f5b98424800 JavaThread "pool-2163-thread-1" [_thread_blocked, id=15960, stack(0x00007f5b7f8d5000,0x00007f5b7f9d6000)]
  0x00007f5b98412000 JavaThread "pool-2160-thread-1" [_thread_blocked, id=15959, stack(0x00007f5b7fad7000,0x00007f5b7fbd8000)]
  0x00007f5b9842f800 JavaThread "pool-2157-thread-1" [_thread_blocked, id=15958, stack(0x00007f5b7caab000,0x00007f5b7cbac000)]
  0x00007f5b98076000 JavaThread "pool-2154-thread-1" [_thread_blocked, id=15957, stack(0x00007f5b814f1000,0x00007f5b815f2000)]
  0x00007f5b98410000 JavaThread "pool-2151-thread-1" [_thread_blocked, id=15956, stack(0x00007f5b7d3b4000,0x00007f5b7d4b5000)]
  0x00007f5b98403000 JavaThread "pool-2148-thread-1" [_thread_blocked, id=15955, stack(0x00007f5b7e4c5000,0x00007f5b7e5c6000)]
  0x00007f5bac0d6800 JavaThread "nioEventLoopGroup-3-16" [_thread_in_native, id=18174, stack(0x00007f5b813f0000,0x00007f5b814f1000)]
  0x00007f5bac0e8800 JavaThread "nioEventLoopGroup-3-15" [_thread_in_native, id=18151, stack(0x00007f5b7edca000,0x00007f5b7eecb000)]
  0x00007f5bc4618000 JavaThread "Druid-ConnectionPool-Destroy-741286713" daemon [_thread_blocked, id=18147, stack(0x00007f5b7eecb000,0x00007f5b7efcc000)]
  0x00007f5c2d149000 JavaThread "Druid-ConnectionPool-Create-741286713" daemon [_thread_blocked, id=18146, stack(0x00007f5b7efcc000,0x00007f5b7f0cd000)]
  0x00007f5bac0e6000 JavaThread "nioEventLoopGroup-3-14" [_thread_in_native, id=18070, stack(0x00007f5b80eeb000,0x00007f5b80fec000)]
  0x00007f5bac0e5800 JavaThread "nioEventLoopGroup-3-13" [_thread_in_native, id=18018, stack(0x00007f5b811ee000,0x00007f5b812ef000)]
=>0x00007f5bac160800 JavaThread "nioEventLoopGroup-3-12" [_thread_in_Java, id=18017, stack(0x00007f5b8c5e8000,0x00007f5b8c6e9000)]
  0x00007f5bac15c800 JavaThread "nioEventLoopGroup-3-11" [_thread_in_native, id=17944, stack(0x00007f5b812ef000,0x00007f5b813f0000)]
  0x00007f5bac15b800 JavaThread "nioEventLoopGroup-3-10" [_thread_in_native, id=17935, stack(0x00007f5b82bf7000,0x00007f5b82cf8000)]
  0x00007f5bac15a800 JavaThread "nioEventLoopGroup-3-9" [_thread_in_native, id=17932, stack(0x00007f5b829f5000,0x00007f5b82af6000)]
  0x00007f5bac159800 JavaThread "nioEventLoopGroup-3-8" [_thread_in_native, id=17926, stack(0x00007f5b82af6000,0x00007f5b82bf7000)]
  0x00007f5c042ad800 JavaThread "Okio Watchdog" daemon [_thread_blocked, id=17892, stack(0x00007f5b82cf8000,0x00007f5b82df9000)]
  0x00007f5c04134000 JavaThread "OkHttp ConnectionPool" daemon [_thread_blocked, id=17887, stack(0x00007f5b8c2e5000,0x00007f5b8c3e6000)]
  0x00007f5bac158000 JavaThread "nioEventLoopGroup-3-7" [_thread_in_native, id=17881, stack(0x00007f5b8c8eb000,0x00007f5b8c9ec000)]
  0x00007f5bac156000 JavaThread "nioEventLoopGroup-3-6" [_thread_in_native, id=17880, stack(0x00007f5b8cbec000,0x00007f5b8cced000)]
  0x00007f5bac154800 JavaThread "nioEventLoopGroup-3-5" [_thread_in_native, id=17878, stack(0x00007f5b8cced000,0x00007f5b8cdee000)]
  0x00007f5bac152800 JavaThread "nioEventLoopGroup-3-4" [_thread_in_native, id=17877, stack(0x00007f5b8cdee000,0x00007f5b8ceef000)]
  0x00007f5bac151000 JavaThread "nioEventLoopGroup-3-3" [_thread_in_native, id=17876, stack(0x00007f5b8ceef000,0x00007f5b8cff0000)]
  0x00007f5bd03fd000 JavaThread "pool-5-thread-1" [_thread_blocked, id=17875, stack(0x00007f5b8cff0000,0x00007f5b8d0f1000)]
  0x00007f5bac14f800 JavaThread "nioEventLoopGroup-3-2" [_thread_in_native, id=17873, stack(0x00007f5b8e0f2000,0x00007f5b8e1f3000)]
  0x00007f5ba8560800 JavaThread "threadDeathWatcher-4-1" daemon [_thread_blocked, id=17847, stack(0x00007f5bbcbbc000,0x00007f5bbccbd000)]
  0x00007f5c2c008800 JavaThread "DestroyJavaVM" [_thread_blocked, id=17782, stack(0x00007f5c33d4e000,0x00007f5c33e4f000)]
  0x00007f5c2ddd4000 JavaThread "ScriptRunner" [_thread_in_native, id=17845, stack(0x00007f5bbcdbe000,0x00007f5bbcebf000)]
  0x00007f5ba84a2000 JavaThread "pool-1-thread-1" [_thread_blocked, id=17842, stack(0x00007f5bbd0c1000,0x00007f5bbd1c2000)]
  0x00007f5bac141800 JavaThread "nioEventLoopGroup-3-1" [_thread_in_native, id=17832, stack(0x00007f5bbdccb000,0x00007f5bbddcc000)]
  0x00007f5bc5846800 JavaThread "nioEventLoopGroup-2-1" [_thread_in_native, id=17831, stack(0x00007f5bbdfcc000,0x00007f5bbe0cd000)]

```