我最近观察到一种现象，即Spring Boot应用程序在我的Fedora 30计算机上启动非常缓慢，耗时数分钟，而同一软件包在Windows计算机上启动非常快。在Fedora上，我安装了两个Java版本：Java 8
openjdk version "1.8.0_222"
OpenJDK Runtime Environment (build 1.8.0_222-b10)
OpenJDK 64-Bit Server VM (build 25.222-b10, mixed mode)
和Java 11
openjdk version "11.0.4" 2019-07-16
OpenJDK Runtime Environment 18.9 (build 11.0.4+11)
OpenJDK 64-Bit Server VM 18.9 (build 11.0.4+11, mixed mode, sharing)
我尝试从两个版本开始，发现在JDK11（〜18s）上它比在JDK1.8（〜146s）上快得多。启动过程是通过使用命令行或Intellij IDEA进行的，并使用VisualVM进行监视。使用的命令行为：
sudo alternatives --config java
java -jar car-hailing-order-server.jar
从JDK1.8开始时，我可以从Intellij IDEA或VisualVM线程转储中看到一条消息，解决了JMX服务器连接问题。在Intellij IDEA中启动时，我可以在事件日志窗口中看到错误消息：
10:46 AM order-server: Failed to retrieve application JMX service URL
并且在由VisualVM监视的同时，线程转储中也会出现类似的消息：
2019-10-09 10:22:44
Full thread dump OpenJDK 64-Bit Server VM (25.222-b10 mixed mode):
"JMX server connection timeout 18" #18 daemon prio=9 os_prio=0 tid=0x00007f6830013000 nid=0xd47 in Object.wait() [0x00007f68860fc000]
java.lang.Thread.State: TIMED_WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007700aaee0> (a [I)
at com.sun.jmx.remote.internal.ServerCommunicatorAdmin$Timeout.run(ServerCommunicatorAdmin.java:168)
- locked <0x00000007700aaee0> (a [I)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- None
"RMI Scheduler(0)" #17 daemon prio=9 os_prio=0 tid=0x00007f6830010800 nid=0xd45 waiting on condition [0x00007f68861fd000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x00000006c762a450> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- None
"RMI TCP Connection(1)-192.168.10.2" #16 daemon prio=9 os_prio=0 tid=0x00007f6824248000 nid=0xd44 runnable [0x00007f688c3f2000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:171)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:246)
at java.io.BufferedInputStream.read(BufferedInputStream.java:265)
- locked <0x000000077006fec8> (a java.io.BufferedInputStream)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:555)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:834)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:688)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler$$Lambda$97/842634384.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:687)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- <0x000000076d234ab8> (a java.util.concurrent.ThreadPoolExecutor$Worker)
"Log4j2-TF-4-Scheduled-2" #15 daemon prio=5 os_prio=0 tid=0x00007f68a05b0800 nid=0xd43 waiting on condition [0x00007f688c1f1000]
java.lang.Thread.State: TIMED_WAITING (parking)
at sun.misc.Unsafe.park(Native Method)
- parking to wait for <0x000000076e7c72c8> (a java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject)
at java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
at java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- None
"RMI TCP Accept-0" #14 daemon prio=9 os_prio=0 tid=0x00007f682c042800 nid=0xd3f runnable [0x00007f688c2f2000]
java.lang.Thread.State: RUNNABLE
at java.net.PlainSocketImpl.socketAccept(Native Method)
at java.net.AbstractPlainSocketImpl.accept(AbstractPlainSocketImpl.java:409)
at java.net.ServerSocket.implAccept(ServerSocket.java:545)
at java.net.ServerSocket.accept(ServerSocket.java:513)
at sun.management.jmxremote.LocalRMIServerSocketFactory$1.accept(LocalRMIServerSocketFactory.java:52)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.executeAcceptLoop(TCPTransport.java:405)
at sun.rmi.transport.tcp.TCPTransport$AcceptLoop.run(TCPTransport.java:377)
at java.lang.Thread.run(Thread.java:748)
Locked ownable synchronizers:
- None
"Attach Listener" #9 daemon prio=9 os_prio=0 tid=0x00007f685c001000 nid=0xd3a waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"Service Thread" #8 daemon prio=9 os_prio=0 tid=0x00007f68a01f3000 nid=0xd38 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"C1 CompilerThread2" #7 daemon prio=9 os_prio=0 tid=0x00007f68a01e8000 nid=0xd37 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"C2 CompilerThread1" #6 daemon prio=9 os_prio=0 tid=0x00007f68a01e6800 nid=0xd36 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"C2 CompilerThread0" #5 daemon prio=9 os_prio=0 tid=0x00007f68a01d7000 nid=0xd35 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"Signal Dispatcher" #4 daemon prio=9 os_prio=0 tid=0x00007f68a01d5000 nid=0xd34 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
Locked ownable synchronizers:
- None
"Finalizer" #3 daemon prio=8 os_prio=0 tid=0x00007f68a01ab000 nid=0xd33 in Object.wait() [0x00007f688d2ad000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000006c7661f40> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:144)
- locked <0x00000006c7661f40> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:165)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:216)
Locked ownable synchronizers:
- None
"Reference Handler" #2 daemon prio=10 os_prio=0 tid=0x00007f68a01a6800 nid=0xd32 in Object.wait() [0x00007f688d3ae000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000006c766dae0> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:502)
at java.lang.ref.Reference.tryHandlePending(Reference.java:191)
- locked <0x00000006c766dae0> (a java.lang.ref.Reference$Lock)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:153)
Locked ownable synchronizers:
- None
"main" #1 prio=5 os_prio=0 tid=0x00007f68a004c800 nid=0xd2c runnable [0x00007f68a451e000]
java.lang.Thread.State: RUNNABLE
at java.io.RandomAccessFile.readBytes(Native Method)
at java.io.RandomAccessFile.read(RandomAccessFile.java:377)
at org.springframework.boot.loader.data.RandomAccessDataFile$FileAccess.read(RandomAccessDataFile.java:224)
- locked <0x00000006c769f688> (a java.lang.Object)
at org.springframework.boot.loader.data.RandomAccessDataFile$FileAccess.access$400(RandomAccessDataFile.java:206)
at org.springframework.boot.loader.data.RandomAccessDataFile.read(RandomAccessDataFile.java:117)
at org.springframework.boot.loader.data.RandomAccessDataFile.read(RandomAccessDataFile.java:101)
at org.springframework.boot.loader.jar.CentralDirectoryFileHeader.fromRandomAccessData(CentralDirectoryFileHeader.java:176)
at org.springframework.boot.loader.jar.JarFileEntries.getEntry(JarFileEntries.java:247)
at org.springframework.boot.loader.jar.JarFileEntries.getEntry(JarFileEntries.java:232)
at org.springframework.boot.loader.jar.JarFileEntries.getEntry(JarFileEntries.java:220)
at org.springframework.boot.loader.jar.JarFileEntries.containsEntry(JarFileEntries.java:173)
at org.springframework.boot.loader.jar.JarFile.containsEntry(JarFile.java:214)
at org.springframework.boot.loader.jar.JarURLConnection.get(JarURLConnection.java:274)
at org.springframework.boot.loader.jar.Handler.openConnection(Handler.java:96)
at java.net.URL.openConnection(URL.java:991)
at sun.misc.URLClassPath$Loader.getResource(URLClassPath.java:746)
at sun.misc.URLClassPath.getResource(URLClassPath.java:249)
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:363)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:362)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
- locked <0x0000000770d23b60> (a java.lang.Object)
at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:93)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at org.springframework.context.support.GenericApplicationContext.<init>(GenericApplicationContext.java:112)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:64)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:172)
at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:122)
at org.springframework.boot.SpringApplication.createApplicationContext(SpringApplication.java:607)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:310)
at org.springframework.boot.builder.SpringApplicationBuilder.run(SpringApplicationBuilder.java:139)
- locked <0x00000006c766df68> (a java.util.concurrent.atomic.AtomicBoolean)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.bootstrapServiceContext(BootstrapApplicationListener.java:203)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:114)
at org.springframework.cloud.bootstrap.BootstrapApplicationListener.onApplicationEvent(BootstrapApplicationListener.java:71)
at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172)
at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139)
at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:127)
at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:75)
at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54)
at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:347)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:306)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248)
at com.winsky.carhailing.order.server.Application.main(Application.java:15)
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 org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:48)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:87)
at org.springframework.boot.loader.Launcher.launch(Launcher.java:50)
at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:51)
Locked ownable synchronizers:
- None
"VM Thread" os_prio=0 tid=0x00007f68a019d000 nid=0xd31 runnable
"GC task thread#0 (ParallelGC)" os_prio=0 tid=0x00007f68a005f000 nid=0xd2d runnable
"GC task thread#1 (ParallelGC)" os_prio=0 tid=0x00007f68a0061000 nid=0xd2e runnable
"GC task thread#2 (ParallelGC)" os_prio=0 tid=0x00007f68a0062800 nid=0xd2f runnable
"GC task thread#3 (ParallelGC)" os_prio=0 tid=0x00007f68a0064800 nid=0xd30 runnable
"VM Periodic Task Thread" os_prio=0 tid=0x00007f68a01f5800 nid=0xd39 waiting on condition
JNI global references: 431
因此，我用Google搜索并找到了此issue，并尝试按照建议的方式应用以下选项：
java -jar -Dcom.sun.management.jmxremote.port=60021 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false car-hailing-order-server.jar
但是它仍然不起作用。
当我更改为JDK11时，它可以在命令行或Intellij IDEA中快速启动。因此，该问题应该与所使用的JDK版本有关，但是我无法找到此问题的完整解决方案（因为我想与其他团队成员一起使用JDK1.8）。