在docker中使用JDK工具包报错_sun.jvm.hotspot.debugger.debuggerexception: cannot

作者：小小林熬夜学编程 | 2024-04-21 06:02:48

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sun.jvm.hotspot.debugger.debuggerexception: cannot open binary file

第一种报错：

第一种报错：


 jinfo -flags 666
Attaching to process ID 666, please wait...
Error attaching to process: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
sun.jvm.hotspot.debugger.DebuggerException: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.execute(LinuxDebuggerLocal.java:163)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:278)
at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:671)
at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:611)
at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:337)
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:483)
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 to the process
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.access$100(LinuxDebuggerLocal.java:62)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1AttachTask.doit(LinuxDebuggerLocal.java:269)
at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$LinuxDebuggerLocalWorkerThread.run(LinuxDebuggerLocal.java:138)

原因

这是因为新版的Linux系统加入了 ptrace-scope 机制. 这种机制为了防止用户访问当前正在运行的进程的内存和状态, 而一些调试软件本身就是利用 ptrace 来进行获取某进程的内存状态的(包括GDB),所以在新版本的Linux系统, 默认情况下不允许再访问了. 可以临时开启. 如:

1	echo 0 \| tee /proc/sys/kernel/yama/ptrace_scope

永久写到文件来持久化:

emacs /etc/sysctl.d/10-ptrace.conf

添加或修改为以下这一句:(0:允许, 1:不允许)

kernel.yama.ptrace_scope = 0

解决


echo 0 | sudo tee /proc/sys/kernel/yama/ptrace_scope
 
 
#再次执行时就可以得到结果了
jinfo -flags 666
Attaching to process ID 666, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.5-b02
Non-default VM flags: -XX:InitialHeapSize=41943040 -XX:MaxHeapSize=536870912 -XX:MaxNewSize=178782208 -XX:MinHeapDeltaBytes=524288 -XX:NewSize=1572864 -XX:OldSize=40370176 -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseParallelGC
Command line: -Dosgi.requiredJavaVersion=1.6 -XX:MaxPermSize=256m -Xms40m -Xmx512m

第二种报错：

Caused by: sun.jvm.hotspot.debugger.DebuggerException: Can't attach to the process: ptrace(PTRACE_ATTACH, ..) failed for 6: Operation not permitted

原因

在docker中出现时：问题分析

发现docker的官方文档提到了，这不是什么 docker 或者jmap的Bug，而是 Docker 自 1.10 版本开始加入的安全特性。 jmap 这类 JDK 工具依赖于 Linux 的 PTRACE_ATTACH，而 Docker 自 1.10 版本开始，默认的 seccomp 配置文件中禁用了 ptrace。

解决

加参数：–security-opt seccomp=unconfined

直接关闭 seccomp 配置或者将ptrace添加到允许的名单中。用法：


#docker运行时加入“--security-opt seccomp=unconfined”参数
docker run -d --name ${DOCKER_NAME} \
        --restart=unless-stopped   \
        --hostname ${HOSTNAME} \
        --security-opt seccomp=unconfined \
        -p 8803:8803 \
        -v /opt/tcp.jar:/opt/tcp.jar \
        -v /opt/config/:/opt/config/ \
        -v /opt/logs/:/opt/logs/ \
        ImageName:TAG
 
 
docker官网文档：https://docs.docker.com/engine/security/seccomp/
 
demo：
Run without the default seccomp profile
You can pass unconfined to run a container without the default seccomp profile.
 
$ docker run --rm -it --security-opt seccomp=unconfined debian:jessie \
    unshare --map-root-user --user sh -c whoami

第三种报错：


Attaching to core -heap from executable 7, please wait...
Error attaching to core file: cannot open binary file
sun.jvm.hotspot.debugger.DebuggerException: cannot open binary file
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:286)
        at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:673)
        at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:611)
        at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:337)
        at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304)
        at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:156)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:191)
        at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
        at sun.jvm.hotspot.tools.PMap.main(PMap.java:72)
        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.jmap.JMap.runTool(JMap.java:201)
        at sun.tools.jmap.JMap.main(JMap.java:130)

原因

命令格式不正确导致


[root@localhost tcp-client1.1]# ../jdk1.8.0_211/bin/jmap 7 -heap
Attaching to core -heap from executable 7, please wait...
Error attaching to core file: cannot open binary file
sun.jvm.hotspot.debugger.DebuggerException: cannot open binary file
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach0(Native Method)
        at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.attach(LinuxDebuggerLocal.java:286)
        at sun.jvm.hotspot.HotSpotAgent.attachDebugger(HotSpotAgent.java:673)
        at sun.jvm.hotspot.HotSpotAgent.setupDebuggerLinux(HotSpotAgent.java:611)
        at sun.jvm.hotspot.HotSpotAgent.setupDebugger(HotSpotAgent.java:337)
        at sun.jvm.hotspot.HotSpotAgent.go(HotSpotAgent.java:304)
        at sun.jvm.hotspot.HotSpotAgent.attach(HotSpotAgent.java:156)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:191)
        at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
        at sun.jvm.hotspot.tools.PMap.main(PMap.java:72)
        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.jmap.JMap.runTool(JMap.java:201)
        at sun.tools.jmap.JMap.main(JMap.java:130)

解决

使用命令command --help查看命令使用说明


[root@localhost tcp-client1.1]# ../jdk1.8.0_211/bin/jmap --help
Usage:
    jmap [option] <pid>
        (to connect to running process)
    jmap [option] <executable <core>
        (to connect to a core file)
    jmap [option] [server_id@]<remote server IP or hostname>
        (to connect to remote debug server)
 
where <option> is one of:
    <none>               to print same info as Solaris pmap
    -heap                to print java heap summary
    -histo[:live]        to print histogram of java object heap; if the "live"
                         suboption is specified, only count live objects
    -clstats             to print class loader statistics
    -finalizerinfo       to print information on objects awaiting finalization
    -dump:<dump-options> to dump java heap in hprof binary format
                         dump-options:
                           live         dump only live objects; if not specified,
                                        all objects in the heap are dumped.
                           format=b     binary format
                           file=<file>  dump heap to <file>
                         Example: jmap -dump:live,format=b,file=heap.bin <pid>
    -F                   force. Use with -dump:<dump-options> <pid> or -histo
                         to force a heap dump or histogram when <pid> does not
                         respond. The "live" suboption is not supported
                         in this mode.
    -h | -help           to print this help message
    -J<flag>             to pass <flag> directly to the runtime system
[root@localhost tcp-client1.1]# ../jdk1.8.0_211/bin/jmap -heap 7
Attaching to process ID 7, please wait...
Debugger attached successfully.
Server compiler detected.
JVM version is 25.211-b12
 
using thread-local object allocation.
Garbage-First (G1) GC with 63 thread(s)
 
Heap Configuration:
   MinHeapFreeRatio         = 40
   MaxHeapFreeRatio         = 70
   MaxHeapSize              = 17179869184 (16384.0MB)
   NewSize                  = 1363144 (1.2999954223632812MB)
   MaxNewSize               = 10301210624 (9824.0MB)
   OldSize                  = 5452592 (5.1999969482421875MB)
   NewRatio                 = 2
   SurvivorRatio            = 8
   MetaspaceSize            = 21807104 (20.796875MB)
   CompressedClassSpaceSize = 1073741824 (1024.0MB)
   MaxMetaspaceSize         = 17592186044415 MB
   G1HeapRegionSize         = 8388608 (8.0MB)
 
Heap Usage:
G1 Heap:
   regions  = 2048
   capacity = 17179869184 (16384.0MB)
   used     = 412985176 (393.85335540771484MB)
   free     = 16766884008 (15990.146644592285MB)
   2.403890108689666% used
G1 Young Generation:
Eden Space:
   regions  = 44
   capacity = 880803840 (840.0MB)
   used     = 369098752 (352.0MB)
   free     = 511705088 (488.0MB)
   41.904761904761905% used
Survivor Space:
   regions  = 3
   capacity = 25165824 (24.0MB)
   used     = 25165824 (24.0MB)
   free     = 0 (0.0MB)
   100.0% used
G1 Old Generation:
   regions  = 3
   capacity = 16273899520 (15520.0MB)
   used     = 18720600 (17.853355407714844MB)
   free     = 16255178920 (15502.146644592285MB)
   0.11503450649300802% used
 
22756 interned Strings occupying 2059192 bytes.
[root@localhost tcp-client1.1]#

其他参考借鉴：

Docker 中无法使用 JDK jmap之 Can't attach to the process: ptrace(PTRACE_ATTACH问题_russle的专栏-CSDN博客

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