java内存不足问题
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【中文标题】java内存不足问题【英文标题】:java run out of memory issue 【发布时间】:2013-08-07 09:09:49 【问题描述】:我有一个 jar 文件在 amazon-ec2-m1.large 实例和 linux 64 位操作系统上运行。 我在不同时间后内存不足,通常在 2-4 之间,尽管在我最后一次写入日志中(在创建错误文件之前)我看到以下内容:
Memory -
totalHeapSize: 264 MB,
maxHeapSize: 1656 MB,
freeHeapSize: 220 MB
当我从 jar 开始直到内存耗尽时,所有值都相同,freeHeapSize 介于 200-230 MB 之间(我每 30 秒检查一次并执行 System.gc())
在 hs_err_pid2250.log 中写入:
#
# 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
另外,我使用的 threadpoolexecutor 有 30 个核心线程,最大 100 个(从不超过 30 个,尽管有时我会使用全部 30 个)
最后,我使用了 50 个连接的 bonecp 连接池
有什么建议吗? :)
根据建议,我在本地电脑上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?还是只是使用的重要?
【问题讨论】:
建议:创建一个heap dump 并找出导致此问题的原因。此处不可见。 看起来 JVM 在启动时崩溃了,崩溃来自尝试为 GC 创建线程、缺少应用程序线程和VM state:not at safepoint (not fully initialized)
的事实证明了这一点。应用程序是否在单独的 JVM 中启动自身的副本?
当你在共享机上运行虚拟机时,真机是否可能内存不足?
joni - 不,彼得 - 不
【参考方案1】:
按照以下人提供的建议,我能够解决几乎相同的错误:
https://confluence.csiro.au/pages/viewpage.action?pageId=278167841
基本上,他们说:
Java 虚拟机启动时,默认情况下会产生许多垃圾收集 (GC) 线程,这些线程用于并行 GC 操作……此类线程的数量由以下公式计算: (ncpus
我使用环境变量限制了垃圾收集线程的数量,如下所示:
export _JAVA_OPTIONS="-XX:ParallelGCThreads=2"
不确定 GC 对整体性能的影响,但至少今天的工作已经完成。
请查看原始帖子以获取更多选项。
祝你好运, - 斯图
【讨论】:
我遇到了完全相同的问题,这解决了它。猜猜我的机器内核太多了! 我无法访问您的链接@Stu。【参考方案2】:如果您使用的是 32 位版本,请尝试 64 位版本的 Java,
还添加新的 JVM 参数“-XX:+CMSClassUnloadingEnabled \”,它会清除一些未使用的类对象
【讨论】:
我用的是 64,我补充一下【参考方案3】:如果您有更多可用的物理内存,请使用 .似乎分配的堆大小只有 1656 mb,这可能还不够。 尝试使用两个开关 -xmx4096mb 和 -xms 2048 运行 java jar 文件 然后监控使用情况,可能内存需求对于您的应用程序来说太大了,如果一段时间后您仍然内存不足,则需要进一步调查以检查您的代码是否泄漏内存。 希望这会有所帮助,如果您需要更多说明,请告诉我
【讨论】:
【参考方案4】:堆只是等式的一部分。看看总驻留内存 - 它包括堆和堆外贡献。堆外包括映射的 JAR、线程堆栈(每个线程约 1MB)、perm gen 等。SO 有很多关于如何在 Linux 上执行此操作的问题。
【讨论】:
如何监控这些“堆外”?【参考方案5】:在不尝试解码转储数据的情况下,我会观察到运行 JVM 的内存不足基本上有三种情况:
-
具有允许累积大量未使用(但仍被引用)的数据的结构(列表或诸如此类的列表)。
让各种“句柄”保持打开状态——文件句柄、线程、数据库操作。尤其是在使用带有原生组件的 API 时,您可能会留下很多东西超出 GC 的范围。
发出一个非常大的请求(或此类请求的“突发”)。
介于两者之间的是课程。如果您运行动态创建和加载类的应用程序,则必须正确使用各个类加载器以使类可收集。
【讨论】:
如果您正在加载一个类,您希望以后不再需要它时能够卸载它,您需要专门为它(或一组相关的类)创建一个“用户类加载器”应该一起卸载)。这是因为类和类加载器本质上是相互引用的,所以使用常规类加载器会将类锁定在适当的位置,使其无法收集。这有点牵扯,而且我实际上从来不需要这样做(至少 10 年左右不需要),所以你必须查看详细信息。【参考方案6】:用最新的jdk解决了。
请尝试安装java-11-openjdk
【讨论】:
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