本文介绍了java内存不足问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我有一个运行在具有Linux 64位操作系统的amazon-ec2-m1.large实例上的jar文件.在不同的小时之后，我通常会在2-4小时之间用完内存，尽管在我上一次写日志时(在创建错误文件之前)，我看到了以下内容:
I have a jar file running on an amazon-ec2-m1.large instance with linux 64bit operating system.I run out of memory after different hours, usually between 2-4, although in my last log write (before the error file created ) I see the following:
Memory -
totalHeapSize: 264 MB,
maxHeapSize: 1656 MB,
freeHeapSize: 220 MB
当我从jar开始查看直到内存用完时-所有值都是相同的，并且freeHeapSize在200-230 MB之间(我每30秒检查一次并执行System.gc())
When I look from the jar start until in run out of memory - all values are the same and the freeHeapSize is between 200-230 MB (i check every 30 seconds and do System.gc() )
在hs_err_pid2250.log中写入:
in the hs_err_pid2250.log wrriten:
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Cannot create GC thread. Out of system resources.
# Possible reasons:
# The system is out of physical RAM or swap space
# In 32 bit mode, the process size limit was hit
# Possible solutions:
# Reduce memory load on the system
# Increase physical memory or swap space
# Check if swap backing store is full
# Use 64 bit Java on a 64 bit OS
# Decrease Java heap size (-Xmx/-Xms)
# Decrease number of Java threads
# Decrease Java thread stack sizes (-Xss)
# Set larger code cache with -XX:ReservedCodeCacheSize=
# This output file may be truncated or incomplete.
#
# Out of Memory Error (gcTaskThread.cpp:46), pid=2250, tid=140227064182528
#
# JRE version: 7.0_25-b15
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.25-b01 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
#
--------------- T H R E A D ---------------
Current thread (0x00007f8920007800): JavaThread "Unknown thread" [_thread_in_vm, id=2251, stack(0x00007f8928493000,0x00007f8928594000)]
Stack: [0x00007f8928493000,0x00007f8928594000], sp=0x00007f89285925d0, free space=1021k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x8a1d3a] VMError::report_and_die()+0x2ea
V [libjvm.so+0x4071fb] report_vm_out_of_memory(char const*, int, unsigned long, char const*)+0x9b
V [libjvm.so+0x4b3e2a] GCTaskThread::GCTaskThread(GCTaskManager*, unsigned int, unsigned int)+0xfa
V [libjvm.so+0x4b2896] GCTaskManager::initialize()+0x266
V [libjvm.so+0x75dc4f] ParallelScavengeHeap::initialize()+0x6cf
V [libjvm.so+0x87a078] Universe::initialize_heap()+0xb8
V [libjvm.so+0x87c7ed] universe_init()+0x7d
V [libjvm.so+0x500315] init_globals()+0x65
V [libjvm.so+0x863a62] Threads::create_vm(JavaVMInitArgs*, bool*)+0x1e2
V [libjvm.so+0x55ff34] JNI_CreateJavaVM+0x74
C [libjli.so+0x2f8e] JavaMain+0x9e
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
Other Threads:
=>0x00007f8920007800 (exited) JavaThread "Unknown thread" [_thread_in_vm, id=2251, stack(0x00007f8928493000,0x00007f8928594000)]
VM state:not at safepoint (not fully initialized)
VM Mutex/Monitor currently owned by a thread: None
GC Heap History (0 events):
No events
Deoptimization events (0 events):
No events
Internal exceptions (0 events):
No events
Events (0 events):
No events
Dynamic libraries:
00400000-00401000 r-xp 00000000 ca:01 9384 /usr/java/jdk1.7.0_25/bin/java
00600000-00601000 rw-p 00000000 ca:01 9384 /usr/java/jdk1.7.0_25/bin/java
01f54000-01f75000 rw-p 00000000 00:00 0 [heap]
86600000-87ac0000 rw-p 00000000 00:00 0
87ac0000-8b800000 rw-p 00000000 00:00 0
8b800000-905b0000 rw-p 00000000 00:00 0
905b0000-d92b0000 rw-p 00000000 00:00 0
d92b0000-db980000 rw-p 00000000 00:00 0
db980000-100000000 rw-p 00000000 00:00 0
7f891d000000-7f891d270000 rwxp 00000000 00:00 0
7f891d270000-7f8920022000 rw-p 00000000 00:00 0
7f8920022000-7f8924000000 ---p 00000000 00:00 0
7f8925555000-7f892574d000 rw-p 00000000 00:00 0
7f892574d000-7f892574e000 ---p 00000000 00:00 0
7f892574e000-7f892584e000 rw-p 00000000 00:00 0
7f892584e000-7f892584f000 ---p 00000000 00:00 0
7f892584f000-7f892595a000 rw-p 00000000 00:00 0 [stack:2252]
7f892595a000-7f8925978000 rw-p 00000000 00:00 0
7f8925978000-7f892599f000 rw-p 00000000 00:00 0
7f892599f000-7f8925be6000 rw-p 00000000 00:00 0
7f8925be6000-7f8925bf1000 rw-p 00000000 00:00 0
7f8925bf1000-7f8925c0f000 rw-p 00000000 00:00 0
7f8925c0f000-7f8925c36000 rw-p 00000000 00:00 0
7f8925c36000-7f8925e7c000 rw-p 00000000 00:00 0
7f8925e7c000-7f8925e90000 rw-p 00000000 00:00 0
7f8925e90000-7f8925fb3000 rw-p 00000000 00:00 0
7f8925fb3000-7f8925fb4000 rw-p 00000000 00:00 0
7f8925fb4000-7f8925fcf000 r-xp 00000000 ca:01 17790 /usr/java/jdk1.7.0_25/jre/lib/amd64/libzip.so
7f8925fcf000-7f89261ce000 ---p 0001b000 ca:01 17790 /usr/java/jdk1.7.0_25/jre/lib/amd64/libzip.so
7f89261ce000-7f89261cf000 rw-p 0001a000 ca:01 17790 /usr/java/jdk1.7.0_25/jre/lib/amd64/libzip.so
7f89261cf000-7f89261db000 r-xp 00000000 ca:01 17544 /lib64/libnss_files-2.12.so
7f89261db000-7f89263da000 ---p 0000c000 ca:01 17544 /lib64/libnss_files-2.12.so
7f89263da000-7f89263db000 r--p 0000b000 ca:01 17544 /lib64/libnss_files-2.12.so
7f89263db000-7f89263dc000 rw-p 0000c000 ca:01 17544 /lib64/libnss_files-2.12.so
7f89263dc000-7f8926405000 r-xp 00000000 ca:01 17571 /usr/java/jdk1.7.0_25/jre/lib/amd64/libjava.so
7f8926405000-7f8926605000 ---p 00029000 ca:01 17571 /usr/java/jdk1.7.0_25/jre/lib/amd64/libjava.so
7f8926605000-7f8926607000 rw-p 00029000 ca:01 17571 /usr/java/jdk1.7.0_25/jre/lib/amd64/libjava.so
7f8926607000-7f8926614000 r-xp 00000000 ca:01 17789 /usr/java/jdk1.7.0_25/jre/lib/amd64/libverify.so
7f8926614000-7f8926813000 ---p 0000d000 ca:01 17789 /usr/java/jdk1.7.0_25/jre/lib/amd64/libverify.so
7f8926813000-7f8926815000 rw-p 0000c000 ca:01 17789 /usr/java/jdk1.7.0_25/jre/lib/amd64/libverify.so
7f8926815000-7f892681c000 r-xp 00000000 ca:01 17559 /lib64/librt-2.12.so
7f892681c000-7f8926a1b000 ---p 00007000 ca:01 17559 /lib64/librt-2.12.so
7f8926a1b000-7f8926a1c000 r--p 00006000 ca:01 17559 /lib64/librt-2.12.so
7f8926a1c000-7f8926a1d000 rw-p 00007000 ca:01 17559 /lib64/librt-2.12.so
7f8926a1d000-7f8926a9f000 r-xp 00000000 ca:01 17537 /lib64/libm-2.12.so
7f8926a9f000-7f8926c9e000 ---p 00082000 ca:01 17537 /lib64/libm-2.12.so
7f8926c9e000-7f8926c9f000 r--p 00081000 ca:01 17537 /lib64/libm-2.12.so
7f8926c9f000-7f8926ca0000 rw-p 00082000 ca:01 17537 /lib64/libm-2.12.so
7f8926ca0000-7f89276e1000 r-xp 00000000 ca:01 17795 /usr/java/jdk1.7.0_25/jre/lib/amd64/server/libjvm.so
7f89276e1000-7f89278e1000 ---p 00a41000 ca:01 17795 /usr/java/jdk1.7.0_25/jre/lib/amd64/server/libjvm.so
7f89278e1000-7f8927984000 rw-p 00a41000 ca:01 17795 /usr/java/jdk1.7.0_25/jre/lib/amd64/server/libjvm.so
7f8927984000-7f89279c0000 rw-p 00000000 00:00 0
7f89279c0000-7f8927b41000 r-xp 00000000 ca:01 7616 /lib64/libc-2.12.so
7f8927b41000-7f8927d41000 ---p 00181000 ca:01 7616 /lib64/libc-2.12.so
7f8927d41000-7f8927d45000 r--p 00181000 ca:01 7616 /lib64/libc-2.12.so
7f8927d45000-7f8927d46000 rw-p 00185000 ca:01 7616 /lib64/libc-2.12.so
7f8927d46000-7f8927d4c000 rw-p 00000000 00:00 0
7f8927d4c000-7f8927d4e000 r-xp 00000000 ca:01 17535 /lib64/libdl-2.12.so
7f8927d4e000-7f8927f4e000 ---p 00002000 ca:01 17535 /lib64/libdl-2.12.so
7f8927f4e000-7f8927f4f000 r--p 00002000 ca:01 17535 /lib64/libdl-2.12.so
7f8927f4f000-7f8927f50000 rw-p 00003000 ca:01 17535 /lib64/libdl-2.12.so
7f8927f50000-7f8927f66000 r-xp 00000000 ca:01 16704 /usr/java/jdk1.7.0_25/jre/lib/amd64/jli/libjli.so
7f8927f66000-7f8928166000 ---p 00016000 ca:01 16704 /usr/java/jdk1.7.0_25/jre/lib/amd64/jli/libjli.so
7f8928166000-7f8928167000 rw-p 00016000 ca:01 16704 /usr/java/jdk1.7.0_25/jre/lib/amd64/jli/libjli.so
7f8928167000-7f892817e000 r-xp 00000000 ca:01 7640 /lib64/libpthread-2.12.so
7f892817e000-7f892837d000 ---p 00017000 ca:01 7640 /lib64/libpthread-2.12.so
7f892837d000-7f892837e000 r--p 00016000 ca:01 7640 /lib64/libpthread-2.12.so
7f892837e000-7f892837f000 rw-p 00017000 ca:01 7640 /lib64/libpthread-2.12.so
7f892837f000-7f8928383000 rw-p 00000000 00:00 0
7f8928383000-7f89283a1000 r-xp 00000000 ca:01 9381 /lib64/ld-2.12.so
7f89283cb000-7f89283d5000 rw-p 00000000 00:00 0
7f89283d5000-7f892848b000 rw-p 00000000 00:00 0
7f892848b000-7f8928493000 rw-s 00000000 ca:01 8174 /tmp/hsperfdata_gurustrade/2250
7f8928493000-7f8928496000 ---p 00000000 00:00 0
7f8928496000-7f8928598000 rw-p 00000000 00:00 0 [stack:2251]
7f892859b000-7f892859e000 rw-p 00000000 00:00 0
7f892859e000-7f892859f000 r--p 00000000 00:00 0
7f892859f000-7f89285a0000 rw-p 00000000 00:00 0
7f89285a0000-7f89285a1000 r--p 0001d000 ca:01 9381 /lib64/ld-2.12.so
7f89285a1000-7f89285a2000 rw-p 0001e000 ca:01 9381 /lib64/ld-2.12.so
7f89285a2000-7f89285a3000 rw-p 00000000 00:00 0
7fff64527000-7fff64548000 rw-p 00000000 00:00 0 [stack]
7fff645ff000-7fff64600000 r-xp 00000000 00:00 0 [vdso]
ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 [vsyscall]
VM Arguments:
java_command: /home/gurustrade/proj/versions/trunk/gt_engine/gt_engine.jar
Launcher Type: SUN_STANDARD
Environment Variables:
PATH=/usr/bin:/bin
SHELL=/bin/sh
Signal Handlers:
SIGSEGV: [libjvm.so+0x8a26a0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGBUS: [libjvm.so+0x8a26a0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGFPE: [libjvm.so+0x73f3d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGPIPE: [libjvm.so+0x73f3d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGXFSZ: [libjvm.so+0x73f3d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGILL: [libjvm.so+0x73f3d0], sa_mask[0]=0x7ffbfeff, sa_flags=0x10000004
SIGUSR1: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGUSR2: [libjvm.so+0x73ed20], sa_mask[0]=0x00000000, sa_flags=0x10000004
SIGHUP: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGINT: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGTERM: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
SIGQUIT: SIG_DFL, sa_mask[0]=0x00000000, sa_flags=0x00000000
--------------- S Y S T E M ---------------
OS:Linux
uname:Linux 3.4.48-45.46.amzn1.x86_64 #1 SMP Wed Jun 12 02:04:44 UTC 2013 x86_64
libc:glibc 2.12 NPTL 2.12
rlimit: STACK 8192k, CORE 0k, NPROC 1024, NOFILE 4096, AS infinity
load average:1.01 1.04 1.10
/proc/meminfo:
MemTotal: 7633612 kB
MemFree: 5784036 kB
Buffers: 186424 kB
Cached: 1025752 kB
SwapCached: 0 kB
Active: 980284 kB
Inactive: 706036 kB
Active(anon): 474096 kB
Inactive(anon): 100 kB
Active(file): 506188 kB
Inactive(file): 705936 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 0 kB
SwapFree: 0 kB
Dirty: 88 kB
Writeback: 0 kB
AnonPages: 474084 kB
Mapped: 43752 kB
Shmem: 156 kB
Slab: 103892 kB
SReclaimable: 84548 kB
SUnreclaim: 19344 kB
KernelStack: 9032 kB
PageTables: 20180 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 3816804 kB
Committed_AS: 2130476 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 23908 kB
VmallocChunk: 34359714455 kB
AnonHugePages: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 7872512 kB
DirectMap2M: 0 kB
CPU:total 2 (4 cores per cpu, 1 threads per core) family 6 model 23 stepping 10, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3, sse4.1, tsc
/proc/cpuinfo:
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5430 @ 2.66GHz
stepping : 10
microcode : 0xa07
cpu MHz : 2660.000
cache size : 6144 KB
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu tsc msr pae cx8 cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm dtherm tpr_shadow vnmi flexpriority
bogomips : 5320.00
clflush size : 64
cache_alignment : 64
address sizes : 38 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 23
model name : Intel(R) Xeon(R) CPU E5430 @ 2.66GHz
stepping : 10
microcode : 0xa07
cpu MHz : 2660.000
cache size : 6144 KB
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu tsc msr pae cx8 cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht pbe syscall nx lm constant_tsc arch_perfmon pebs bts rep_good nopl pni dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm dca sse4_1 lahf_lm dtherm tpr_shadow vnmi flexpriority
bogomips : 5320.00
clflush size : 64
cache_alignment : 64
address sizes : 38 bits physical, 48 bits virtual
power management:
Memory: 4k page, physical 7633612k(5784036k free), swap 0k(0k free)
vm_info: Java HotSpot(TM) 64-Bit Server VM (23.25-b01) for linux-amd64 JRE (1.7.0_25-b15), built on Jun 5 2013 20:48:36 by "java_re" with gcc 4.3.0 20080428 (Red Hat 4.3.0-8)
time: Mon Aug 5 16:11:16 2013
elapsed time: 0 seconds
此外，我使用具有30个核心线程和最多100个最大线程的threadpoolexecutor(虽然有时会全部使用30个线程，但用户最多不能超过30个)
Also, I use threadpoolexecutor with 30 core threads and 100 max (never user more than 30 although at some times I use all 30)
最后，我使用具有50个连接的bonecp连接池
Finally, I user bonecp connection pool with 50 connections
有什么建议吗?:)
在提出建议之后，我从本地PC运行应用程序后添加了一个堆转储.我怎样才能从这里继续?关键的橙色跳跃重要吗?还是仅重要的一个?
After suggestion, I added a heap dump after running the application from my local pc.How can I continue from here?Are the critical orange jumps important?, or just the used important?
推荐答案
通过遵循以下建议，我能够解决几乎相同的错误:
I was able to resolve an almost identical error by following the advice given by:
https://confluence.csiro.au/pages/viewpage.action? pageId = 278167841
本质上，他们说:
我使用环境变量限制了垃圾收集线程的数量，就像这样:
I limited the number of garbage collecting threads using the environment variable, like so:
export _JAVA_OPTIONS="-XX:ParallelGCThreads=2"
不确定GC的整体性能是否受到影响，但至少今天的工作已经完成.
Not sure about the overall performance hit regarding GC, but at least today's work is done.
请查看原始帖子以了解更多选项.
Please check the original post for more options.
祝你好运，-斯图
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