Linux上具有Java应用程序的OOM杀手
作者：互联网
我在具有500MB RAM的Linux系统(版本2.6.39.2)上的Java应用程序遇到问题.我的应用程序每小时都要占用1-2MB的本地内存.该应用程序从使用的40MB驻留内存开始. 15天后,OOM杀手杀死了我的应用程序(请参阅附件日志).
更多信息：
>我没有为应用程序设置任何内存限制(没有Xms,Xmx等).
>当使用了396MB的常驻内存时,我进行了堆转储,但对于Memory Analysis工具,我仅使用7.8MB的内存,并且没有特殊的内存泄漏.
我该怎么做才能找到问题的根源,或者如何确保不会杀死我的应用程序？
在此先感谢您的帮助.
最好的祝福.
编辑：
它是没有服务器的独立嵌入式应用程序.该问题发生在机器上的已部署应用程序上(难以安装分析工具),但是在我的开发PC上却没有.
Jun 7 06:15:41 HMI user.warn kernel: java invoked oom-killer: gfp_mask=0x201da, order=0, oom_adj=0, oom_score_adj=0
Jun 7 06:15:42 HMI user.warn kernel: Pid: 650, comm: java Not tainted 2.6.39.2 #7
Jun 7 06:15:42 HMI user.warn kernel: Call Trace:
Jun 7 06:15:42 HMI user.warn kernel: [<c144c264>] ? printk+0xf/0x11
Jun 7 06:15:42 HMI user.warn kernel: [<c1074eb8>] dump_header.clone.8+0x58/0x150
Jun 7 06:15:42 HMI user.warn kernel: [<c11dd008>] ? ___ratelimit+0x78/0xf0
Jun 7 06:15:42 HMI user.warn kernel: [<c1075121>] oom_kill_process.clone.11+0x41/0x220
Jun 7 06:15:42 HMI user.warn kernel: [<c10376e8>] ? has_capability_noaudit+0x18/0x30
Jun 7 06:15:42 HMI user.warn kernel: [<c1074fd5>] ? oom_badness+0x25/0x130
Jun 7 06:15:42 HMI user.warn kernel: [<c10755ef>] out_of_memory+0x1bf/0x2a0
Jun 7 06:15:42 HMI user.warn kernel: [<c1078b4a>] __alloc_pages_nodemask+0x5aa/0x5c0
Jun 7 06:15:42 HMI user.warn kernel: [<c107a1cb>] __do_page_cache_readahead+0xdb/0x200
Jun 7 06:15:42 HMI user.warn kernel: [<c1072b00>] ? wait_on_page_bit+0x90/0xa0
Jun 7 06:15:42 HMI user.warn kernel: [<c107a539>] ra_submit+0x19/0x20
Jun 7 06:15:42 HMI user.warn kernel: [<c1074762>] filemap_fault+0x3d2/0x3e0
Jun 7 06:15:42 HMI user.warn kernel: [<c1086de9>] __do_fault+0x39/0x3a0
Jun 7 06:15:42 HMI user.warn kernel: [<c1074390>] ? __lock_page_or_retry+0x50/0x50
Jun 7 06:15:42 HMI user.warn kernel: [<c1089540>] handle_pte_fault+0x70/0x5b0
Jun 7 06:15:42 HMI user.warn kernel: [<c1089b0f>] handle_mm_fault+0x8f/0x100
Jun 7 06:15:42 HMI user.warn kernel: [<c101ff00>] do_page_fault+0x100/0x3d0
Jun 7 06:15:42 HMI user.warn kernel: [<c1053e0a>] ? sys_futex+0x5a/0x100
Jun 7 06:15:42 HMI user.warn kernel: [<c101fe00>] ? vmalloc_sync_all+0x110/0x110
Jun 7 06:15:42 HMI user.warn kernel: [<c144ed1a>] error_code+0x5a/0x60
Jun 7 06:15:42 HMI user.warn kernel: [<c1440000>] ? vsc_sata_init_one+0x1f6/0x278
Jun 7 06:15:42 HMI user.warn kernel: [<c101fe00>] ? vmalloc_sync_all+0x110/0x110
Jun 7 06:15:42 HMI user.warn kernel: Mem-Info:
Jun 7 06:15:42 HMI user.warn kernel: DMA per-cpu:
Jun 7 06:15:42 HMI user.warn kernel: CPU 0: hi: 0, btch: 1 usd: 0
Jun 7 06:15:42 HMI user.warn kernel: Normal per-cpu:
Jun 7 06:15:42 HMI user.warn kernel: CPU 0: hi: 186, btch: 31 usd: 52
Jun 7 06:15:42 HMI user.warn kernel: active_anon:111882 inactive_anon:51 isolated_anon:0
Jun 7 06:15:42 HMI user.warn kernel: active_file:70 inactive_file:853 isolated_file:0
Jun 7 06:15:42 HMI user.warn kernel: unevictable:0 dirty:0 writeback:0 unstable:0
Jun 7 06:15:42 HMI user.warn kernel: free:1183 slab_reclaimable:307 slab_unreclaimable:1016
Jun 7 06:15:42 HMI user.warn kernel: mapped:149 shmem:122 pagetables:302 bounce:0
Jun 7 06:15:42 HMI user.warn kernel: DMA free:2028kB min:88kB low:108kB high:132kB active_anon:13696kB inactive_anon:0kB active_file:0kB inactive_file:72kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:15800kB mlocked:0kB dirty:0kB writeback:0kB ma
Jun 7 06:15:42 HMI user.warn kernel: lowmem_reserve[]: 0 483 483 483
Jun 7 06:15:42 HMI user.warn kernel: Normal free:2704kB min:2768kB low:3460kB high:4152kB active_anon:433832kB inactive_anon:204kB active_file:280kB inactive_file:3340kB unevictable:0kB isolated(anon):0kB isolated(file):0kB present:495488kB mlocked:0kB dirty:0kB w
Jun 7 06:15:42 HMI user.warn kernel: lowmem_reserve[]: 0 0 0 0
Jun 7 06:15:42 HMI user.warn kernel: DMA: 393*4kB 7*8kB 3*16kB 1*32kB 1*64kB 2*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2028kB
Jun 7 06:15:42 HMI user.warn kernel: Normal: 676*4kB 0*8kB 0*16kB 0*32kB 0*64kB 0*128kB 0*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2704kB
Jun 7 06:15:42 HMI user.warn kernel: 1057 total pagecache pages
Jun 7 06:15:42 HMI user.warn kernel: 0 pages in swap cache
Jun 7 06:15:42 HMI user.warn kernel: Swap cache stats: add 0, delete 0, find 0/0
Jun 7 06:15:42 HMI user.warn kernel: Free swap = 0kB
Jun 7 06:15:42 HMI user.warn kernel: Total swap = 0kB
Jun 7 06:15:42 HMI user.warn kernel: 128928 pages RAM
Jun 7 06:15:42 HMI user.warn kernel: 0 pages HighMem
Jun 7 06:15:42 HMI user.warn kernel: 2847 pages reserved
Jun 7 06:15:42 HMI user.warn kernel: 476 pages shared
Jun 7 06:15:42 HMI user.warn kernel: 124258 pages non-shared
Jun 7 06:15:42 HMI user.info kernel: [ pid ] uid tgid total_vm rss cpu oom_adj oom_score_adj name
Jun 7 06:15:42 HMI user.info kernel: [ 78] 0 78 535 77 0 -17 -1000 udevd
Jun 7 06:15:42 HMI user.info kernel: [ 314] 0 314 422 17 0 0 0 zeroconf
Jun 7 06:15:42 HMI user.info kernel: [ 320] 1 320 420 17 0 0 0 portmap
Jun 7 06:15:42 HMI user.info kernel: [ 349] 0 349 618 22 0 0 0 rc
Jun 7 06:15:42 HMI user.info kernel: [ 358] 42 358 585 38 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 362] 44 362 3139 184 0 0 0 hald
Jun 7 06:15:42 HMI user.info kernel: [ 363] 0 363 805 45 0 0 0 hald-runner
Jun 7 06:15:42 HMI user.info kernel: [ 374] 0 374 821 32 0 0 0 hald-addon-inpu
Jun 7 06:15:42 HMI user.info kernel: [ 386] 44 386 767 35 0 0 0 hald-addon-acpi
Jun 7 06:15:42 HMI user.info kernel: [ 401] 0 401 531 23 0 0 0 dropbear
Jun 7 06:15:42 HMI user.info kernel: [ 406] 0 406 425 22 0 0 0 acpid
Jun 7 06:15:42 HMI user.info kernel: [ 411] 0 411 617 16 0 0 0 syslogd
Jun 7 06:15:42 HMI user.info kernel: [ 413] 0 413 617 18 0 0 0 klogd
Jun 7 06:15:42 HMI user.info kernel: [ 422] 46 422 666 48 0 0 0 avahi-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 423] 46 423 666 42 0 0 0 avahi-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 431] 0 431 886 18 0 0 0 pure-ftpd
Jun 7 06:15:42 HMI user.info kernel: [ 442] 0 442 618 16 0 0 0 S97x11Dm
Jun 7 06:15:42 HMI user.info kernel: [ 443] 0 443 741 26 0 0 0 xinit
Jun 7 06:15:42 HMI user.info kernel: [ 445] 0 445 7850 4035 0 0 0 X
Jun 7 06:15:42 HMI user.info kernel: [ 452] 0 452 617 15 0 0 0 sh
Jun 7 06:15:42 HMI user.info kernel: [ 453] 0 453 2008 226 0 0 0 matchbox-window
Jun 7 06:15:42 HMI user.info kernel: [ 454] 0 454 2001 725 0 0 0 matchbox-deskto
Jun 7 06:15:42 HMI user.info kernel: [ 455] 0 455 1479 183 0 0 0 matchbox-panel
Jun 7 06:15:42 HMI user.info kernel: [ 472] 0 472 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 474] 0 474 154396 104395 0 0 0 java
Jun 7 06:15:42 HMI user.info kernel: [ 479] 0 479 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 484] 0 484 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 489] 0 489 585 36 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 496] 0 496 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 504] 0 504 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 509] 0 509 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 514] 0 514 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 519] 0 519 585 36 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 524] 0 524 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 529] 0 529 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 535] 0 535 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 540] 0 540 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 546] 0 546 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 552] 0 552 585 36 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 557] 0 557 585 36 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 562] 0 562 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 567] 0 567 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 572] 0 572 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 577] 0 577 585 36 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 582] 0 582 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 587] 0 587 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 592] 0 592 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 597] 0 597 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 602] 0 602 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 610] 0 610 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 616] 0 616 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 621] 0 621 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 626] 0 626 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 631] 0 631 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 636] 0 636 585 35 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 641] 0 641 585 34 0 0 0 dbus-daemon
Jun 7 06:15:42 HMI user.info kernel: [ 642] 0 642 1407 155 0 0 0 mb-applet-menu-
Jun 7 06:15:42 HMI user.info kernel: [ 649] 0 649 1397 139 0 0 0 mb-applet-clock
Jun 7 06:15:42 HMI user.info kernel: [ 837] 0 837 530 77 0 -17 -1000 udevd
Jun 7 06:15:42 HMI user.info kernel: [ 838] 0 838 532 78 0 -17 -1000 udevd
Jun 7 06:15:42 HMI user.err kernel: Out of memory: Kill process 474 (java) score 798 or sacrifice child
Jun 7 06:15:42 HMI user.err kernel: Killed process 474 (java) total-vm:617584kB, anon-rss:417580kB, file-rss:0kB
解决方法:
因此,您正在泄漏内存,并且想知道原因和位置.
您可以做的几件事
>将垃圾收集日志与所有详细选项一起使用
>使用jdk工具(带有histo选项的jmap向您显示哪些类有多少个实例在运行等等)
> jkd工具#2 jvisualvm-周围最好的免费工具
>有免费版本的商业工具,例如appdynamics lite / jxinsight opus
>使用-XX：HeapDumpOnOutOfMemoryError并在获得OOM之后分析堆转储
>代码审查也不会有害-最有可能您是不会放弃不需要的信息
标签：out-of-memory,linux,java 来源： https://codeday.me/bug/20191101/1981974.html