记一次Java Core Dump分析过程
背景提要
很久没有亲自动手部署代码了，命令行的亲切感越来越低。放飞了键盘，习惯了鼠标操作的windows环境。冷不丁实操部署也是不错的。
常常在部署时，运维同学对于[hs_err_pid]文件视而不见。殊不知这是Java 虚拟机崩溃日志。
这次是如何分析问题的？
一、首先查看日志头文件
#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f90e71183a8, pid=6167, tid=0x00007f8fab3e6700
#
# JRE version: Java(TM) SE Runtime Environment (8.0_144-b01) (build 1.8.0_144-b01)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (25.144-b01 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libc.so.6+0x1503a8] __memmove_ssse3_back+0x138
#
# 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
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
日志头文件包含概要信息，简述了导致crash的原因。
The crash happened outside the Java Virtual Machine in native code.
能明显看到本次崩溃是因为JNI。
二、接下来查看崩溃时线程信息
--------------- T H R E A D ---------------
Current thread (0x00007f90cc03f800): JavaThread "restartedMain" [_thread_in_native, id=23577, stack(0x00007f8fab2e6000,0x00007f8fab3e7000)]
siginfo: si_signo: 11 (SIGSEGV), si_code: 1 (SEGV_MAPERR), si_addr: 0x00007f90e7be5000
Registers:
RAX=0x00007f8fcc04e4f2, RBX=0x00007f90e7be34e2, RCX=0x00007f8fcc04e4f0, RDX=0x00000000000013d5
RSP=0x00007f8fab3e2c68, RBP=0x00007f8fab3e2cc0, RSI=0x00007f90e7be4ff0, RDI=0x00007f8fcc050000
R8 =0x00007f8fcc04e4f2, R9 =0x0000000000002f84, R10=0x0000000000000070, R11=0x00007f90e714c6d0
R12=0x00007f90e7bdd085, R13=0x00007f8fcc014390, R14=0x0000000000002f63, R15=0x00007f90e021f5e0
RIP=0x00007f90e71183a8, EFLAGS=0x0000000000010202, CSGSFS=0x0000000000000033, ERR=0x0000000000000004
TRAPNO=0x000000000000000e
Top of Stack: (sp=0x00007f8fab3e2c68)
0x00007f8fab3e2c68: 00007f90e5065c09 00007f90d1046960
0x00007f8fab3e2c78: 6863639000000000 000000000000642f
0x00007f8fab3e2c88: 00000000014b502f 00007f8fcc014390
0x00007f8fab3e2c98: 00007f90e021f7d0 00007f900c01da90
0x00007f8fab3e2ca8: 00007f90e021f5e0 000000004d79b210
0x00007f8fab3e2cb8: 000000000000000d 00007f8fab3e2d20
0x00007f8fab3e2cc8: 00007f90e506618f 00007f90cc03f800
0x00007f8fab3e2cd8: 01007f902466f0c0 00007f8fab3e2d40
0x00007f8fab3e2ce8: 00007f8fab3e2d4e 00007f8fab3e2d4c
0x00007f8fab3e2cf8: 00007f8fab3e2d40 000000000000000d
0x00007f8fab3e2d08: 00007f90cc03f9f8 00007f8fab3e3198
0x00007f8fab3e2d18: 0000000000000001 00007f8fab3e3180
0x00007f8fab3e2d28: 00007f90e5057ec0 00007f8fab3e2d70
0x00007f8fab3e2d38: 00007f90e021f5e0 632f63642f6d6f63
0x00007f8fab3e2d48: 0000002f6e696168 00007f90bb0423d8
0x00007f8fab3e2d58: 00007f90cc03f800 00007f8fab3e2db0
0x00007f8fab3e2d68: 00007f8fab3e2e30 00007f90bb0423d8
0x00007f8fab3e2d78: 00007f90cc03f800 00007f8fab3e2db0
0x00007f8fab3e2d88: 00007f90cc02e850 000000076f6d3910
0x00007f8fab3e2d98: 00007f90bb0423d8 00007f90cc03d800
0x00007f8fab3e2da8: 00007f90cc03f800 00007f8fab3e2f40
0x00007f8fab3e2db8: 00007f90e66a739f 00007f90d2ad3d50
0x00007f8fab3e2dc8: 0000000000000000 00007f8fab3e2e20
0x00007f8fab3e2dd8: 00007f8fab3e2ea0 00007f8fab3e2f70
0x00007f8fab3e2de8: 00007f8fab3e2ff0 00007f90cc03f9f8
0x00007f8fab3e2df8: 00007f90e66c64d0 00007f9004028a70
0x00007f8fab3e2e08: 00007f9004028a80 00007f9004028e58
0x00007f8fab3e2e18: 00000000000003d8 00007f8fab3e35a0
0x00007f8fab3e2e28: 000000076f6d3910 00000006c7c1da60
0x00007f8fab3e2e38: 00007f90d2ad4078 00007f90d2ad3d50
0x00007f8fab3e2e48: 0000000000000000 00007f8fab3e3740
0x00007f8fab3e2e58: 00007f8fab3e3680 00007f90cc03f800
从线程名已经缺定了JavaThread "restartedMain"。调用重启方法线程，触发了崩溃。
三、再来查看崩溃时线程栈信息
Stack: [0x00007f8fab2e6000,0x00007f8fab3e7000], sp=0x00007f8fab3e2c68, free space=1011k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libc.so.6+0x1503a8] __memmove_ssse3_back+0x138
C [libzip.so+0x1218f] ZIP_GetEntry2+0xff
C [libzip.so+0x3ec0] Java_java_util_zip_ZipFile_getEntry+0xf0
J 19 java.util.zip.ZipFile.getEntry(J[BZ)J (0 bytes) @ 0x00007f90d110140e [0x00007f90d1101340+0xce]
J 6501 C2 java.util.zip.ZipFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry; (101 bytes) @ 0x00007f90d1d10708 [0x00007f90d1d10380+0x388]
J 11361 C2 java.util.jar.JarFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry; (22 bytes) @ 0x00007f90d13b7018 [0x00007f90d13b6fe0+0x38]
J 11334 C2 sun.misc.URLClassPath$JarLoader.getResource(Ljava/lang/String;Z)Lsun/misc/Resource; (85 bytes) @ 0x00007f90d11ba604 [0x00007f90d11ba580+0x84]
J 5624 C2 sun.misc.URLClassPath$1.next()Z (63 bytes) @ 0x00007f90d2299ae0 [0x00007f90d22998c0+0x220]
J 29485 C2 java.net.URLClassLoader$3$1.run()Ljava/lang/Object; (5 bytes) @ 0x00007f90d34e1090 [0x00007f90d34e1040+0x50]
v ~StubRoutines::call_stub
V [libjvm.so+0x693e96] JavaCalls::call_helper(JavaValue*, methodHandle*, JavaCallArguments*, Thread*)+0x1056
V [libjvm.so+0x72d16c] JVM_DoPrivileged+0x27c
J 1053 java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;Ljava/security/AccessControlContext;)Ljava/lang/Object; (0 bytes) @ 0x00007f90d1460095 [0x00007f90d145ffc0+0xd5]
J 25745 C2 java.net.URLClassLoader$3.hasMoreElements()Z (5 bytes) @ 0x00007f90d54a81a4 [0x00007f90d54a8100+0xa4]
J 29484 C2 sun.misc.CompoundEnumeration.hasMoreElements()Z (5 bytes) @ 0x00007f90d4b42620 [0x00007f90d4b425a0+0x80]
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.doFindAllClassPathResources(Ljava/lang/String;)Ljava/util/Set;+35
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.findAllClassPathResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+19
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+52
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.findPathMatchingResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+17
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+38
j org.springframework.boot.devtools.restart.ClassLoaderFilesResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+13
j org.springframework.context.support.GenericApplicationContext.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+18
j org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(Ljava/lang/String;)Ljava/util/Set;+49
j org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan([Ljava/lang/String;)Ljava/util/Set;+39
j org.springframework.context.annotation.ComponentScanAnnotationParser.parse(Lorg/springframework/core/annotation/AnnotationAttributes;Ljava/lang/String;)Ljava/util/Set;+517
J 25607 C1 org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(Lorg/springframework/context/annotation/ConfigurationClass;Lorg/springframework/context/annotation/ConfigurationClassParser$SourceClass;)Lorg/springframework/context/annotation/ConfigurationClassParser$SourceClass; (515 bytes) @ 0x00007f90d17aa93c [0x00007f90d17aa220+0x71c]
J 3183 C1 org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(Lorg/springframework/context/annotation/ConfigurationClass;)V (143 bytes) @ 0x00007f90d1c875ac [0x00007f90d1c870e0+0x4cc]
j org.springframework.context.annotation.ConfigurationClassParser.parse(Lorg/springframework/core/type/AnnotationMetadata;Ljava/lang/String;)V+10
j org.springframework.context.annotation.ConfigurationClassParser.parse(Ljava/util/Set;)V+66
j org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+291
j org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+107
j org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(Ljava/util/Collection;Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+28
j org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(Lorg/springframework/beans/factory/config/ConfigurableListableBeanFactory;Ljava/util/List;)V+229
j org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(Lorg/springframework/beans/factory/config/ConfigurableListableBeanFactory;)V+5
j org.springframework.context.support.AbstractApplicationContext.refresh()V+28
j org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh()V+1
j org.springframework.boot.SpringApplication.refresh(Lorg/springframework/context/ApplicationContext;)V+11
j org.springframework.boot.SpringApplication.refreshContext(Lorg/springframework/context/ConfigurableApplicationContext;)V+2
j org.springframework.boot.SpringApplication.run([Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+91
j org.springframework.boot.SpringApplication.run([Ljava/lang/Object;[Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+9
j org.springframework.boot.SpringApplication.run(Ljava/lang/Object;[Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+9
j com.dc.chain.Application.main([Ljava/lang/String;)V+31
v ~StubRoutines::call_stub
V [libjvm.so+0x693e96] JavaCalls::call_helper(JavaValue*, methodHandle*, JavaCallArguments*, Thread*)+0x1056
V [libjvm.so+0x9a0447] Reflection::invoke(instanceKlassHandle, methodHandle, Handle, bool, objArrayHandle, BasicType, objArrayHandle, bool, Thread*)+0x5d7
V [libjvm.so+0x9a3b57] Reflection::invoke_method(oopDesc*, Handle, objArrayHandle, Thread*)+0x147
V [libjvm.so+0x72754b] JVM_InvokeMethod+0x26b
J 1920 sun.reflect.NativeMethodAccessorImpl.invoke0(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (0 bytes) @ 0x00007f90d17c586d [0x00007f90d17c5780+0xed]
J 12554 C2 sun.reflect.NativeMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (104 bytes) @ 0x00007f90d27308f4 [0x00007f90d2730880+0x74]
J 31113 C2 org.springsource.loaded.ri.OriginalClassInvoker.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (17 bytes) @ 0x00007f90d3671c98 [0x00007f90d3671be0+0xb8]
J 25653 C2 org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (2214 bytes) @ 0x00007f90d23f1a5c [0x00007f90d23f1380+0x6dc]
j org.springframework.boot.devtools.restart.RestartLauncher.run()V+41
v ~StubRoutines::call_stub
V [libjvm.so+0x693e96] JavaCalls::call_helper(JavaValue*, methodHandle*, JavaCallArguments*, Thread*)+0x1056
V [libjvm.so+0x6943a1] JavaCalls::call_virtual(JavaValue*, KlassHandle, Symbol*, Symbol*, JavaCallArguments*, Thread*)+0x321
V [libjvm.so+0x694847] JavaCalls::call_virtual(JavaValue*, Handle, KlassHandle, Symbol*, Symbol*, Thread*)+0x47
V [libjvm.so+0x72fbd0] thread_entry(JavaThread*, Thread*)+0xa0
V [libjvm.so+0xa79753] JavaThread::thread_main_inner()+0x103
V [libjvm.so+0xa7989c] JavaThread::run()+0x11c
V [libjvm.so+0x92a338] java_start(Thread*)+0x108
C [libpthread.so.0+0x7e25] start_thread+0xc5
Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
J 19 java.util.zip.ZipFile.getEntry(J[BZ)J (0 bytes) @ 0x00007f90d1101398 [0x00007f90d1101340+0x58]
J 6501 C2 java.util.zip.ZipFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry; (101 bytes) @ 0x00007f90d1d10708 [0x00007f90d1d10380+0x388]
J 11361 C2 java.util.jar.JarFile.getEntry(Ljava/lang/String;)Ljava/util/zip/ZipEntry; (22 bytes) @ 0x00007f90d13b7018 [0x00007f90d13b6fe0+0x38]
J 11334 C2 sun.misc.URLClassPath$JarLoader.getResource(Ljava/lang/String;Z)Lsun/misc/Resource; (85 bytes) @ 0x00007f90d11ba604 [0x00007f90d11ba580+0x84]
J 5624 C2 sun.misc.URLClassPath$1.next()Z (63 bytes) @ 0x00007f90d2299ae0 [0x00007f90d22998c0+0x220]
J 29485 C2 java.net.URLClassLoader$3$1.run()Ljava/lang/Object; (5 bytes) @ 0x00007f90d34e1090 [0x00007f90d34e1040+0x50]
v ~StubRoutines::call_stub
J 1053 java.security.AccessController.doPrivileged(Ljava/security/PrivilegedAction;Ljava/security/AccessControlContext;)Ljava/lang/Object; (0 bytes) @ 0x00007f90d1460023 [0x00007f90d145ffc0+0x63]
J 25745 C2 java.net.URLClassLoader$3.hasMoreElements()Z (5 bytes) @ 0x00007f90d54a81a4 [0x00007f90d54a8100+0xa4]
J 29484 C2 sun.misc.CompoundEnumeration.hasMoreElements()Z (5 bytes) @ 0x00007f90d4b42620 [0x00007f90d4b425a0+0x80]
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.doFindAllClassPathResources(Ljava/lang/String;)Ljava/util/Set;+35
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.findAllClassPathResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+19
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+52
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.findPathMatchingResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+17
j org.springframework.core.io.support.PathMatchingResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+38
j org.springframework.boot.devtools.restart.ClassLoaderFilesResourcePatternResolver.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+13
j org.springframework.context.support.GenericApplicationContext.getResources(Ljava/lang/String;)[Lorg/springframework/core/io/Resource;+18
j org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider.findCandidateComponents(Ljava/lang/String;)Ljava/util/Set;+49
j org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan([Ljava/lang/String;)Ljava/util/Set;+39
j org.springframework.context.annotation.ComponentScanAnnotationParser.parse(Lorg/springframework/core/annotation/AnnotationAttributes;Ljava/lang/String;)Ljava/util/Set;+517
J 25607 C1 org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(Lorg/springframework/context/annotation/ConfigurationClass;Lorg/springframework/context/annotation/ConfigurationClassParser$SourceClass;)Lorg/springframework/context/annotation/ConfigurationClassParser$SourceClass; (515 bytes) @ 0x00007f90d17aa93c [0x00007f90d17aa220+0x71c]
J 3183 C1 org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(Lorg/springframework/context/annotation/ConfigurationClass;)V (143 bytes) @ 0x00007f90d1c875ac [0x00007f90d1c870e0+0x4cc]
j org.springframework.context.annotation.ConfigurationClassParser.parse(Lorg/springframework/core/type/AnnotationMetadata;Ljava/lang/String;)V+10
j org.springframework.context.annotation.ConfigurationClassParser.parse(Ljava/util/Set;)V+66
j org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+291
j org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+107
j org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(Ljava/util/Collection;Lorg/springframework/beans/factory/support/BeanDefinitionRegistry;)V+28
j org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(Lorg/springframework/beans/factory/config/ConfigurableListableBeanFactory;Ljava/util/List;)V+229
j org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(Lorg/springframework/beans/factory/config/ConfigurableListableBeanFactory;)V+5
j org.springframework.context.support.AbstractApplicationContext.refresh()V+28
j org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh()V+1
j org.springframework.boot.SpringApplication.refresh(Lorg/springframework/context/ApplicationContext;)V+11
j org.springframework.boot.SpringApplication.refreshContext(Lorg/springframework/context/ConfigurableApplicationContext;)V+2
j org.springframework.boot.SpringApplication.run([Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+91
j org.springframework.boot.SpringApplication.run([Ljava/lang/Object;[Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+9
j org.springframework.boot.SpringApplication.run(Ljava/lang/Object;[Ljava/lang/String;)Lorg/springframework/context/ConfigurableApplicationContext;+9
j com.dc.chain.Application.main([Ljava/lang/String;)V+31
v ~StubRoutines::call_stub
J 1920 sun.reflect.NativeMethodAccessorImpl.invoke0(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (0 bytes) @ 0x00007f90d17c57f7 [0x00007f90d17c5780+0x77]
J 12554 C2 sun.reflect.NativeMethodAccessorImpl.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (104 bytes) @ 0x00007f90d27308f4 [0x00007f90d2730880+0x74]
J 31113 C2 org.springsource.loaded.ri.OriginalClassInvoker.invoke(Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (17 bytes) @ 0x00007f90d3671c98 [0x00007f90d3671be0+0xb8]
J 25653 C2 org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(Ljava/lang/reflect/Method;Ljava/lang/Object;[Ljava/lang/Object;)Ljava/lang/Object; (2214 bytes) @ 0x00007f90d23f1a5c [0x00007f90d23f1380+0x6dc]
j org.springframework.boot.devtools.restart.RestartLauncher.run()V+41
v ~StubRoutines::call_stub
明显看到栈顶调用为： Java_java_util_zip_ZipFile_getEntry+0xf0
四、根据栈顶信息查询
当然是用的某歌搜索引擎，查到如下地址：
(Crash in [libzip.so+0x1218f] ZIP_GetEntry2+0xff)[https://bugs.openjdk.java.net/browse/JDK-8175970]
查询到结果，可以知道在JDK 9中修正了这个Bug。
This is fixed in JDK 9 with JDK-8145260.
Most of the times, the crashes in ZIP_GetEntry occur when the jar file being accessed has been modified/overwritten while the JVM instance was running. The following property can be used to disable the memory mapping of the central directory structure of the Jar files:
-Dsun.zip.disableMemoryMapping=true
Please note that enabling this property would have some performance impact on the application as the JVM needs to read the central directory structure from the Jar files on the disk again and again whenever it reads a Jar file entry. So, it is best to ensure that the jar files are not modified or overwritten while the JVM has an image of them loaded.
For details refer the following :
https://blogs.oracle.com/poonam/entry/crashes_in_zip_getentry
记一次Java Core Dump分析过程的更多相关文章
- 性能分析之-- JAVA Thread Dump 分析综述
性能分析之-- JAVA Thread Dump 分析综述 一.Thread Dump介绍 1.1什么是Thread Dump? Thread Dump是非常有用的诊断Java应用问题的工 ...
- Java core dump
目录 生成Java core dump core dump分析 生成Java core dump 可以按照下面这个文章的指引来通过jni调用触发Java core dump Generating a ...
- .net core dump分析
服务器上如果出现cpu内存饱满,找不到原因,那么dump文件分析必不可少. 起初是想在linux下调试.net core 的dump,但是环境一直无法安装 搞了许久没搞出来,其次文章太少了,googl ...
- 性能分析之– JAVA Thread Dump 分析
最近在做性能测试,需要对线程堆栈进行分析,在网上收集了一些资料,学习完后,将相关知识整理在一起,输出文章如下. 一.Thread Dump介绍 1.1什么是Thread Dump? Thread Du ...
- (转)性能分析之-- JAVA Thread Dump 分析综述
原文链接:http://blog.csdn.net/rachel_luo/article/details/8920596 最近在做性能测试,需要对线程堆栈进行分析,在网上收集了一些资料,学习完后,将相 ...
- java线程dump分析工具
jstack和线程dump分析 java程序性能分析之thread dump和heap dump 一.[内存dump] jmap –dump:live,format=b,file=heap.bin ...
- Java线程Dump分析工具--jstack【转载】
jstack用于打印出给定的java进程ID或core file或远程调试服务的Java堆栈信息,如果是在64位机器上,需要指定选项"-J-d64",Windows的jstack使 ...
- Java线程Dump分析工具--jstack（转）
jstack用于打印出给定的java进程ID或core file或远程调试服务的Java堆栈信息,如果是在64位机器上,需要指定选项"-J-d64",Windows的jstack使 ...
- Java线程Dump分析工具--jstack
jstack用于打印出给定的java进程ID或core file或远程调试服务的Java堆栈信息,如果是在64位机器上,需要指定选项"-J-d64",Windows的jstack使 ...
随机推荐
- Linux之find
命令功能: find命令是用来在给定的目录下查找符合给定条件的文件.它需要从磁盘中查找,效率低,whereis和locate是基于缓存中数据库查找,效率很高,但是一些新建的文件可能未加入到数据库中,使 ...
- unity的一些tips
主要是我知乎上回答的一个关于unity的tip,备忘. 说说我所看到unity相关的,不好的习惯: 1 尽量不要在Awake(), start()等函数内加入业务逻辑的初始化代码.首先无法简便的直接启 ...
- Mysql 数据库操作之DDL、DML、DQL语句操作
Mysql 数据库操作之DDL.DML.DQL语句操作 设置数据库用户名密码 l Show databases 查看数据库列表信息 l 查看数据库中的数据表信息 ,格式: use 数据库名: sh ...
- go语言学习--处理map的无序输出
最近工作中遇到了这样的一个场景,需要处理一个无限极分类的问题,对于数据结构的定义首先想到了,map,map[int]map[int]struct.通过两层map的定义归类parent_id和id的关系 ...
- html 之 <meta> 标签之http-equiv
语法规则: <meta http-equiv=“参数” content=“参数值” > 1.X-UA-Compatible 文档兼容模式的定义 <meta http-equiv=“X ...
- 普通PC机支持内存128G,单条32G内存
以前,不管是英特尔还是AMD的消费级平台支持内存容量大多都是64GB,这一现状被英特尔公司去年推出的第九代酷睿而改变.第九代酷睿最大支持128GB内存,虽然只是简单的提高了内存容量,对大多数电脑用户而 ...
- 先 FROM 后 WHERE 再 GROUP BY 再 SELECT 再 order BY
shutdown -r -t 5office:515740906family-asus:786512915office-T420i:837829568 family-T420:868 638 325 ...
- Visual Studio资源汇总
Visual Studio 2015:http://tieba.baidu.com/p/3442930798Visual Studio 2013:http://tieba.baidu.com/p/34 ...
- SpringBoot 出现Whitelabel Error Page 解决办法
这是咋了,咋的就404了 我路径也挺对的啊 注解也都写上了啊 咋就找不到了呢? debug吧它不进方法 看日志吧,他还不报错 这家伙给我急的 百度一下午也没解决,最后还是看官网才知道错在了那里,程序只 ...
- jqueryValidate
参数详情可参见: http://www.runoob.com/jquery/jquery-plugin-validate.html 基本使用: /** 数据保存前校验 **/ $("#use ...