远程调试时 Intellij 断点不命中 tomcat

Question

环境：

操作系统：Mac10.13.6
Java-8
Tomcat-7
Intellij 社区 2019.3
Gradle 5.2.1

命令行输出：

$ export GRADLE_OPTS="-agentlib:jdwp=transport=dt_socket,server=y,suspend=address=5005"
$ ./gradlew myproj-web-java:tomcatRunWar
Listening for transport dt_socket at address: 5005
Starting a Gradle Daemon, 2 incompatible and 2 stopped Daemons could not be reused, use --status for details

Run/Debug 配置：

Debugger Mode: Attach to remote JVM
Use module classpath: myproj-parent:myproj-web-java:main

开始调试，Intellij输出：

Connected to the target VM, address: 'localhost:5005', transport: 'socket'

我在controller中加了断点，通过浏览器访问页面。页面正确呈现，我可以看到控制台输出的日志，但断点没有命中。

如果我在 Intellij 中暂停程序，我可以看到主线程的堆栈：

kevent0:-1, KQueueArrayWrapper (sun.nio.ch)
poll:198, KQueueArrayWrapper (sun.nio.ch)
doSelect:117, KQueueSelectorImpl (sun.nio.ch)
lockAndDoSelect:86, SelectorImpl (sun.nio.ch)
select:97, SelectorImpl (sun.nio.ch)
select:101, SelectorImpl (sun.nio.ch)
read:179, SocketConnection$SocketInputStream (org.gradle.internal.remote.internal.inet)
fill:139, Input (com.esotericsoftware.kryo.io)
require:159, Input (com.esotericsoftware.kryo.io)
readInt:308, Input (com.esotericsoftware.kryo.io)
readSmallInt:120, KryoBackedDecoder (org.gradle.internal.serialize.kryo)
read:139, DefaultSerializerRegistry$TaggedTypeSerializer (org.gradle.internal.serialize)
read:36, Serializers$StatefulSerializerAdapter (org.gradle.internal.serialize)
receive:80, SocketConnection (org.gradle.internal.remote.internal.inet)
receive:75, DaemonClientConnection (org.gradle.launcher.daemon.client)
receive:35, DaemonClientConnection (org.gradle.launcher.daemon.client)
monitorBuild:211, DaemonClient (org.gradle.launcher.daemon.client)
executeBuild:179, DaemonClient (org.gradle.launcher.daemon.client)
execute:142, DaemonClient (org.gradle.launcher.daemon.client)
execute:93, DaemonClient (org.gradle.launcher.daemon.client)
run:52, RunBuildAction (org.gradle.launcher.cli)
execute:207, Actions$RunnableActionAdapter (org.gradle.internal)
execute:402, CommandLineActionFactory$ParseAndBuildAction (org.gradle.launcher.cli)
execute:375, CommandLineActionFactory$ParseAndBuildAction (org.gradle.launcher.cli)
execute:37, ExceptionReportingAction (org.gradle.launcher.cli)
execute:23, ExceptionReportingAction (org.gradle.launcher.cli)
execute:368, CommandLineActionFactory$WithLogging (org.gradle.launcher.cli)
execute:298, CommandLineActionFactory$WithLogging (org.gradle.launcher.cli)
doAction:36, Main (org.gradle.launcher)
run:45, EntryPoint (org.gradle.launcher.bootstrap)
invoke0:-1, NativeMethodAccessorImpl (sun.reflect)
invoke:62, NativeMethodAccessorImpl (sun.reflect)
invoke:43, DelegatingMethodAccessorImpl (sun.reflect)
invoke:498, Method (java.lang.reflect)
runNoExit:60, ProcessBootstrap (org.gradle.launcher.bootstrap)
run:37, ProcessBootstrap (org.gradle.launcher.bootstrap)
main:23, GradleMain (org.gradle.launcher)

主线程或其他线程中没有我的代码。但是，如果我检查进程列表，似乎 tomcat.

没有独立的 jvm 进程

并且当程序暂停时，我仍然可以在控制台输出暂停的情况下访问页面。

Answer 1

如此设置 GRADL_OPTS - 您正在为 Gradle 守护进程本身启动调试进程 ，而不是为分叉的 Java 进程启动调试进程，其中Tomcat 服务器实际运行。

您可以使用 Gradle Run/Debug Configuration 启动 Tomcat 服务器，您在其中指定 JVM 选项 for forked process:

截图来自这篇文章：Debugging a spring-mvc web-app with the gradle-tomcat-plugin and IntelliJ IDEA

远程调试时 Intellij 断点不命中 tomcat

Intellij break point does not hit when remote debugging tomcat

java

tomcat

gradle

intellij-idea

gradle-tomcat-plugin