lzc-alioo/gcdoc

jdk GC专项文档

GC 文档知识库

这里将详细的收录关于JDK GC相关的知识

注：如无特殊说明，将均以jdk8为例来进行讲解

通过这里你可以了解到：

• 垃圾收集器举例

• 垃圾收集原理

• 日志样例

• gc参数清单

• jvmoptions解释说明

• arthas工具的使用

• jit相关

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如下是测试内容 aaaa

mac10.15 & jdk8 使用jinfo报错 Can't attach symbolicator to the process mac version 10.15 (19A583)

java -version java version "1.8.0_192" Java(TM) SE Runtime Environment (build 1.8.0_192-b12) Java HotSpot(TM) 64-Bit Server VM (build 25.192-b12, mixed mode)

jinfo报错详细信息 jinfo 2976 Attaching to process ID 2976, please wait... Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach symbolicator to the process sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach symbolicator to the process at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$BsdDebuggerLocalWorkerThread.execute(BsdDebuggerLocal.java:169) at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.attach(BsdDebuggerLocal.java:287) at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:671) at sun.jvm.hotspot.HotSpotAgent.setupDebuggerDarwin(HotSpotAgent.java:659) at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:341) at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304) at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:140) at sun.jvm.hotspot.tools.Tool.start(Tool.java:185) at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118) at sun.jvm.hotspot.tools.JInfo.main(JInfo.java:138) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.tools.jinfo.JInfo.runTool(JInfo.java:108) at sun.tools.jinfo.JInfo.main(JInfo.java:76) Caused by: sun.jvm.hotspot.debugger.DebuggerException: Can't attach symbolicator to the process at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.attach0(Native Method) at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.access$100(BsdDebuggerLocal.java:65) at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$1AttachTask.doit(BsdDebuggerLocal.java:278) at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$BsdDebuggerLocalWorkerThread.run(BsdDebuggerLocal.java:144)

报错原因及解决方法 官方bug,已在jdk9中修复，详情参见 https://bugs.openjdk.java.net/browse/JDK-8160376