CodeHeap::expand_by malloc failed

Christian Thalinger christian.thalinger at oracle.com
Fri May 30 00:35:28 UTC 2014


Although it’s the code cache I assume runtime folk would know more about this.  Maybe send to hotspot-dev.

On May 29, 2014, at 9:01 AM, Vitaly Davidovich <vitalyd at gmail.com> wrote:

> Hi guys,
> 
> Need a bit of help explaining a hotspot malloc failure crash on 7u51.  I'm going to paste the relevant snippets from the hs_err log.
> 
> #
> # There is insufficient memory for the Java Runtime Environment to continue.
> # Native memory allocation (malloc) failed to allocate 65536 bytes for committing reserved memory.
> # 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 (os_linux.cpp:2726), pid=10643, tid=47319048501520
> #
> # JRE version: Java(TM) SE Runtime Environment (7.0_51-b13) (build 1.7.0_51-b13)
> # Java VM: Java HotSpot(TM) 64-Bit Server VM (24.51-b03 mixed mode linux-amd64 compressed oops)
> 
> 
> ---------------  T H R E A D  ---------------
> 
> Current thread (0x0000000000716800):  JavaThread "C2 CompilerThread0" daemon [_thread_in_vm, id=10689, stack(0x00002b095303b000,0x00002b095313c000)]
> 
> Stack: [0x00002b095303b000,0x00002b095313c000],  sp=0x00002b0953138d20,  free space=1015k
> Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
> V  [libjvm.so+0x992f4a]  VMError::report_and_die()+0x2ea
> V  [libjvm.so+0x4931ab]  report_vm_out_of_memory(char const*, int, unsigned long, char const*)+0x9b
> V  [libjvm.so+0x81338e]  os::Linux::commit_memory_impl(char*, unsigned long, bool)+0xfe
> V  [libjvm.so+0x81383f]  os::Linux::commit_memory_impl(char*, unsigned long, unsigned long, bool)+0x4f
> V  [libjvm.so+0x813a2c]  os::pd_commit_memory(char*, unsigned long, unsigned long, bool)+0xc
> V  [libjvm.so+0x80daea]  os::commit_memory(char*, unsigned long, unsigned long, bool)+0x2a
> V  [libjvm.so+0x98e849]  VirtualSpace::expand_by(unsigned long, bool)+0x1c9
> V  [libjvm.so+0x58a62c]  CodeHeap::expand_by(unsigned long)+0x8c
> V  [libjvm.so+0x42111d]  CodeCache::allocate(int)+0x4d
> V  [libjvm.so+0x7e1a39]  nmethod::new_nmethod(methodHandle, int, int, CodeOffsets*, int, DebugInformationRecorder*, Dependencies*, CodeBuffer*, int, OopMapSet*, ExceptionHandlerTable*, ImplicitExceptionTable*, AbstractCompiler*, int)+0x179
> V  [libjvm.so+0x3cfc54]  ciEnv::register_method(ciMethod*, int, CodeOffsets*, int, CodeBuffer*, int, OopMapSet*, ExceptionHandlerTable*, ImplicitExceptionTable*, AbstractCompiler*, int, bool, bool)+0x364
> V  [libjvm.so+0x4458fb]  Compile::Compile(ciEnv*, C2Compiler*, ciMethod*, int, bool, bool)+0x11cb
> V  [libjvm.so+0x3afa76]  C2Compiler::compile_method(ciEnv*, ciMethod*, int)+0x176
> V  [libjvm.so+0x44ba9e]  CompileBroker::invoke_compiler_on_method(CompileTask*)+0x33e
> V  [libjvm.so+0x44c87d]  CompileBroker::compiler_thread_loop()+0x43d
> V  [libjvm.so+0x94d5ff]  JavaThread::thread_main_inner()+0xdf
> V  [libjvm.so+0x94d705]  JavaThread::run()+0xf5
> V  [libjvm.so+0x815538]  java_start(Thread*)+0x108
> 
> Code Cache  [0x00002b091755c000, 0x00002b091869c000, 0x00002b091a55c000)
>  total_blobs=7033 nmethods=6349 adapters=634 free_code_cache=31715Kb largest_free_block=32247296
> 
> Memory mappings around the code cache virtual space (bolded line is the code cache segment, I believe, based on the Code Cache output above):
> 
> 2b091755c000-2b091869c000 rwxp 00000000 00:00 0
> 2b09186ac000-2b091d66f000 rw-p 00000000 00:00 0
> 2b091d66f000-2b091d670000 ---p 00000000 00:00 0
> 2b091d670000-2b091d770000 rwxp 00000000 00:00 0
> 2b091d770000-2b091d771000 ---p 00000000 00:00 0
> 2b091d771000-2b091d871000 rwxp 00000000 00:00 0
> 2b091d871000-2b091d872000 ---p 00000000 00:00 0
> 2b091d872000-2b091d972000 rwxp 00000000 00:00 0
> 
> /proc/meminfo:
> MemTotal:       49521668 kB
> MemFree:         5596796 kB
> Buffers:          294684 kB
> Cached:         34205856 kB
> SwapCached:            0 kB
> Active:         12745128 kB
> Inactive:       28516788 kB
> Active(anon):    9280636 kB
> Inactive(anon):  3090264 kB
> Active(file):    3464492 kB
> Inactive(file): 25426524 kB
> Unevictable:       14420 kB
> Mlocked:           14420 kB
> SwapTotal:             0 kB
> SwapFree:              0 kB
> Dirty:             20392 kB
> Writeback:             0 kB
> AnonPages:       6776540 kB
> Mapped:          6292204 kB
> Shmem:           5604620 kB
> Slab:            1828656 kB
> SReclaimable:    1567928 kB
> SUnreclaim:       260728 kB
> KernelStack:        4648 kB
> PageTables:        58800 kB
> NFS_Unstable:          0 kB
> Bounce:                0 kB
> WritebackTmp:          0 kB
> CommitLimit:    47045584 kB
> Committed_AS:   46046480 kB
> VmallocTotal:   34359738367 kB
> VmallocUsed:      460188 kB
> VmallocChunk:   34333703480 kB
> HugePages_Total:       0
> HugePages_Free:        0
> HugePages_Rsvd:        0
> HugePages_Surp:        0
> Hugepagesize:       2048 kB
> DirectMap4k:        8192 kB
> DirectMap2M:     2080768 kB
> DirectMap1G:    48234496 kB
> 
> Memory: 4k page, physical 49521668k(5596796k free), swap 0k(0k free)
> 
> * overcommit is turned off
> 
> So the code heap was attempting to expand by 65kb at a fixed address.  There appears to be a 65kb mapping available between the end of the current code heap mapping (2b091755c000-2b091869c000) and the next one (2b09186ac000-2b091d66f000).  There's about 30mb of free space left (reserved, but uncommitted I take it) in the virtual space, so it's a bit puzzling given there's ample physical mem available.  Only thing I can think of is expansion fails because it cannot get contiguous space, but then I can't reconcile that with the mem mapping above. 
> 
> Does anyone have any ideas?
> 
> Let me know if you need additional info from the hs_err file.
> 
> Thanks
> 

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