attach tomcat进程失败

[SilenceXXX1]

• 我已经在 issues 里搜索，没有重复的issue。

环境信息

• Arthas 版本: 4.0.2
• 操作系统版本: Linux host-10-19-185-50 4.19.90-24.4.v2101.ky10.x86_64 GNU/Linux
• 目标进程的JVM版本: openjdk11

重现问题的步骤

执行命令连接 tomcat应用 java -jar arthas-boot.jar 1213551

期望的结果

请问导致这个错误的原因是什么？除了重启tomcat外，有其他的解决办法吗？

实际运行的结果

1、无法成功连接到tomcat进程，之前也出现过重启tomcat后一般就可以正常连接，但是长时间运行tomcat后，就会出现问题。
2、arthas报错后，检查tomcat中的应用运行情况并无问题，可以正常访问web应用。
3、tomcat已运行了8天，tomcat内有11个web应用，内存约4GB，线程数量约1700
4、tomcat jvmArg -Xss512k -XX:MaxDirectMemorySize=64M -XX:CICompilerCount=2 -XX:G1ReservePercent=10 -XX:InitiatingHeapOccupancyPercent=70 -Dio.netty.maxDirectMemory=16777216 -agentlib:jdwp=transport=dt_socket,server=y,suspend=n,address=*:12887

实际运行结果，最好有详细的日志，异常栈。尽量贴文本。

[INFO] JAVA_HOME: /xxx/openjdk11linux64.1
[INFO] arthas-boot version: 4.0.2
[INFO] arthas home: /root/arthas
[INFO] Try to attach process 1213551
Picked up JAVA_TOOL_OPTIONS: 
[ERROR] Start arthas failed, exception stack trace: 
com.sun.tools.attach.AttachOperationFailedException: java.lang.NullPointerException
        at jdk.attach/sun.tools.attach.VirtualMachineImpl.execute(VirtualMachineImpl.java:225)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.executeCommand(HotSpotVirtualMachine.java:309)
        at jdk.attach/sun.tools.attach.HotSpotVirtualMachine.getSystemProperties(HotSpotVirtualMachine.java:190)
        at com.taobao.arthas.core.Arthas.attachAgent(Arthas.java:105)
        at com.taobao.arthas.core.Arthas.<init>(Arthas.java:27)
        at com.taobao.arthas.core.Arthas.main(Arthas.java:161)
[INFO] Attach process 1213551 success.
[INFO] arthas-client connect 127.0.0.1 3658
Connect to telnet server error: 127.0.0.1 3658
java.net.ConnectException: Connection refused (Connection refused)
        at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:412)
        at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:255)
        at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:237)
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
        at java.base/java.net.Socket.connect(Socket.java:609)
        at org.apache.commons.net.SocketClient.connect(SocketClient.java:188)
        at org.apache.commons.net.SocketClient.connect(SocketClient.java:209)
        at com.taobao.arthas.client.TelnetConsole.process(TelnetConsole.java:306)
        at com.taobao.arthas.client.TelnetConsole.main(TelnetConsole.java:166)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at com.taobao.arthas.boot.Bootstrap.main(Bootstrap.java:634)