java 如何让 Jsvc 找到 DaemonLoader？
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How can I get Jsvc to find the DaemonLoader?
提问by johnnieb
I have the commons-daemon-x.jarin the classpath. The Jsvcis successfully launching the Java VM. But jsvcis reporting that it cannot find the daemon loader class even though it is in the classpath.
我commons-daemon-x.jar在classpath. 该JSVC成功启动Java VM。但是jsvc报告它无法找到守护程序加载器类，即使它在classpath.
Does anyone know how to solve this problem? I'm running Mac OS X 10.8.3. Thanks.
有谁知道如何解决这个问题？我正在运行 Mac OS X 10.8.3。谢谢。
Here's an excerpt of the jsvcdebug output:
这是jsvc调试输出的摘录：
...
+-- DUMPING JAVA VM CREATION ARGUMENTS -----------------
| Version: 0x010004
| Ignore Unrecognized Arguments: False
| Extra options: 1
| "-Djava.class.path=commons-daemon-1.0.15.jar:./api-monitor.jar" (0x00000000)
+———————————————————————————
...
Java VM created successfully
Cannot find daemon loader org/apache/commons/daemon/support/DaemonLoader
java_init failed
Service exit with a return value of 1
...
Here's the full debug output if it helps:
如果有帮助，这里是完整的调试输出：
sudo jsvc -jvm server -debug -cp commons-daemon-1.0.15.jar:./api-monitor.jar ApiMonitorDaemon
+-- DUMPING PARSED COMMAND LINE ARGUMENTS --------------
| Detach: True
| Show Version: No
| Show Help: No
| Check Only: Disabled
| Stop: False
| Wait: 0
| Run as service: No
| Install service: No
| Remove service: No
| JVM Name: "server"
| Java Home: "null"
| PID File: "/var/run/jsvc.pid"
| User Name: "null"
| Extra Options: 1
| "-Djava.class.path=commons-daemon-1.0.15.jar:./api-monitor.jar"
| Class Invoked: "ApiMonitorDaemon"
| Class Arguments: 0
+-------------------------------------------------------
Home not specified on command line, using environment
Home not on command line or in environment, searching
Attempting to locate Java Home in /System/Library/Frameworks/JavaVM.framework/Home
Attempting to locate VM configuration file /System/Library/Frameworks/JavaVM.framework/Home/jre/lib/jvm.cfg
Attempting to locate VM configuration file /System/Library/Frameworks/JavaVM.framework/Home/lib/jvm.cfg
Found VM configuration file at /System/Library/Frameworks/JavaVM.framework/Home/lib/jvm.cfg
Found VM client definition in configuration
Checking library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libclient.dylib
Found VM jvm definition in configuration
Checking library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libjvm.dylib
Found VM hotspot definition in configuration
Checking library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libhotspot.dylib
Found VM server definition in configuration
Checking library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libserver.dylib
Found VM classic definition in configuration
Checking library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libclassic.dylib
Cannot locate library for VM classic (skipping)
Java Home located in /System/Library/Frameworks/JavaVM.framework/Home
+-- DUMPING JAVA HOME STRUCTURE ------------------------
| Java Home: "/System/Library/Frameworks/JavaVM.framework/Home"
| Java VM Config.: "/System/Library/Frameworks/JavaVM.framework/Home/lib/jvm.cfg"
| Found JVMs: 4
| JVM Name: "client"
| "/System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libclient.dylib"
| JVM Name: "jvm"
| "/System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libjvm.dylib"
| JVM Name: "hotspot"
| "/System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libhotspot.dylib"
| JVM Name: "server"
| "/System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libserver.dylib"
+-------------------------------------------------------
my-server:Applications developer$ redirecting stdout to /dev/null and stderr to /dev/null
Switching umask back to 022 from 077
Using specific JVM in /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libserver.dylib
Attemtping to load library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libserver.dylib
JVM library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libserver.dylib loaded
Attemtping to load library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libverify.dylib
Shell library /System/Library/Frameworks/JavaVM.framework/Home/../Libraries/libverify.dylib loaded
JVM library entry point found (0x02A49762)
+-- DUMPING JAVA VM CREATION ARGUMENTS -----------------
| Version: 0x010004
| Ignore Unrecognized Arguments: False
| Extra options: 1
| "-Djava.class.path=commons-daemon-1.0.15.jar:./api-monitor.jar" (0x00000000)
+-------------------------------------------------------
| Internal options: 4
| "-Dcommons.daemon.process.id=8919" (0x00000000)
| "-Dcommons.daemon.process.parent=8918" (0x00000000)
| "-Dcommons.daemon.version=1.0.15-dev" (0x00000000)
| "abort" (0x022bef30)
+-------------------------------------------------------
Java VM created successfully
Cannot find daemon loader org/apache/commons/daemon/support/DaemonLoader
java_init failed
Service exit with a return value of 1
回答by Jesper Fyhr Knudsen
You probably found the solution by now, but just in case someone stumble over this in the future, what I had missed in mine is that current directory defaults to '/', so you have to specify it if you want to use relative paths.
您现在可能已经找到了解决方案，但以防万一有人在将来偶然发现这一点，我在我的中遗漏的是当前目录默认为“/”，因此如果您想使用相对路径，则必须指定它。
sudo jsvc -jvm server -cwd /path/to/my/daemon/ -cp commons-daemon-1.0.15.jar:./api-monitor.jar ApiMonitorDaemon
Note: my OS is ubuntu 12.10
注意：我的操作系统是 ubuntu 12.10
回答by Adrian Lopez
Check the permissions of the commons-daemon-1.0.15.jarfile, make sure your current user can read it.
检查commons-daemon-1.0.15.jar文件的权限，确保您的当前用户可以读取它。
