Need help interpreting an Apache error message

I hope my Apache/Tomcat questions of late aren't off topic - I am trying to get them to work together so that Tomcat will handle Java servlet.
I'm one of collection of newbies trying to troubleshoot the fact that we can't do anything with servlets even though everything seems to be set up OK. I need to verify that my interpretation of an Apache error message is correct (or not).
Anyway, whenever someone types in the URL of a servlet in the form http:/myURL/mydomainname.com/servlet/HelloWorld (where URL is in the form ##.#.###.###, since the domain name officially "assigned" to the URL yet) The browser displays an error message saying that /myURL/mydomainname.com/servlet/HelloWorld was not found on the server.
Upon looking at the Apache error log, the following statement is found::
[Sat Jul 23 17:54:10 2005] [error] [client XX.X.XXX.XXX] File does not exist: /home/virtual/site1/fst/var/www/html/servlet
(this is a virtual site; all that extra /virtual/site1/fst/ is supposed to be in there.
Note the fact that the error message stops at the word "servlet" and does not say "/servlet/HelloWorld". That makes me think that Apache does not realize that "/servlet" means "send what comes next over to Tomcat" and instead thinks that the browser is trying to get into a DIRECTORY called "/servlet" which does not exist.
Am I correct in this? Does that error message imply that is what is going wrong?

Your note is making me think that you've got the
Apache Web server running on Linux, and you've tried
to make Tomcat the servlet/JSP engine that Apache
forwards all servlet/JSP requests to. Apache is
listening on port 80, of course. All correct?All correct.
I'm not sure that you've got Tomcat bolted onto
Apache properly, Probably not. My question is, basically, is that what the aforementioned error message is implying??
or if you've deployed your servlet
correctly. Again - does the aforementioned error message indicate that Apache simply isn't calling Tomcat in the first place, in which case nothing is even looking for the servlet? Yes or no? I've experimented and found that Apache error messages always stop at the first thing that they don't recognize. For example, if someone types in http://URL/domainame/totally/bogus/vaporware, the Apache error message will say: "File does not exist: /home/virtual/site1/fst/var/www/html/totally" because the directory "/totally/" is the first thing it comes accross that does not exist. I'm trying to verify that possibility so that I know better where to look for the error. Or is it possible that Apache DOES recognize what /servlet/ means, is succesfully getting to Tomcat, but something else is going wrong that causes Apache to sned that error message?
Also, there is no sign of activity in Tomcat's Catalina.out log file since the day
I last turned Tomcat on (successfully). Since that's the only thing in Tomcat's log folder, I assumed it was where Tocmat's error messages would show up (if not, where are they? Havn't been able to find anything else). If that is the case, Tomcat has indeed not been contacvted by Apache.

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Edited by: ladsoftware on Oct 9, 2009 6:08 AM
Edited by: ladsoftware on Oct 9, 2009 6:09 AM
Edited by: ladsoftware on Oct 9, 2009 6:10 AM
Edited by: ladsoftware on Oct 9, 2009 6:11 AM

ladsoftware wrote:
Subject: Re: I need help with this code error "unreachable statement"
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j org.apache.cxf.service.invoker.AbstractInvoker.invoke(Lorg/apache/cxf/message/Exchange;
Ljava/lang/Object;Ljava/lang/reflect/Method;Ljava/util/List;)Ljava/lang/Object;+26
j org.apache.cxf.jaxws.JAXWSMethodInvoker.invoke(Lorg/apache/cxf/message/Exchange;
Ljava/lang/Object;Ljava/lang/reflect/Method;Ljava/util/List;)Ljava/lang/Object;+179
j org.apache.cxf.service.invoker.AbstractInvoker.invoke(Lorg/apache/cxf/message/Exchange;Ljava/lang/Object;)
Ljava/lang/Object;+114
j org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run()V+26
j org.apache.cxf.workqueue.SynchronousExecutor.execute(Ljava/lang/Runnable;)V+1
j org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(Lorg/apache/cxf/message/Message;)V+94
j org.apache.cxf.phase.PhaseInterceptorChain.dcntercept(Lorg/apache/cxf/message/Message;)Z+76
j org.apache.cxf.transport.ChainInitiationObserver.onMessage(Lorg/apache/cxf/message/Message;)V+137
j org.apache.cxf.transport.http_jetty.JettyHTTPDestination.serviceRequest(Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;)V+334
j org.apache.cxf.transport.http_jetty.JettyHTTPDestination.doService(Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;)V+341
j org.apache.cxf.transport.http_jetty.JettyHTTPHandler.handle(Ljava/lang/String;Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;I)V+47
j org.mortbay.jetty.handler.ContextHandler.handle(Ljava/lang/String;Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;I)V+700
j org.mortbay.jetty.handler.ContextHandlerCollection.handle(Ljava/lang/String;Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;I)V+272
j org.mortbay.jetty.handler.HandlerWrapper.handle(Ljava/lang/String;Ljavax/servlet/http/HttpServletRequest;
Ljavax/servlet/http/HttpServletResponse;I)V+23
j org.mortbay.jetty.Server.handle(Lorg/mortbay/jetty/HttpConnection;)V+110
j org.mortbay.jetty.HttpConnection.handleRequest()V+131
J org.mortbay.jetty.HttpParser.parseNext()J
v ~RuntimeStub::alignment_frame_return Runtime1 stub
j org.mortbay.jetty.HttpParser.parseAvailable()J+1
j org.mortbay.jetty.HttpConnection.handle()V+122
j org.mortbay.jetty.bio.SocketConnector$Connection.run()V+130
j org.mortbay.jetty.security.SslSocketConnector$SslConnection.run()V+51
j org.mortbay.thread.BoundedThreadPool$PoolThread.run()V+45
v ~StubRoutines::call_stub
--------------- P R O C E S S ---------------
Java Threads: ( => current thread )
0x0aa2d9f8 JavaThread "RMI RenewClean-[47.166.94.29:3617]" daemon [_thread_in_native, id=4792]
=>0x0aa1eaa0 JavaThread "btpool0-5" [_thread_in_native, id=4420]
0x0aa1c450 JavaThread "btpool0-4" [_thread_in_native, id=4600]
0x0aa574d0 JavaThread "btpool0-3" [_thread_in_native, id=3456]
0x0aa61c60 JavaThread "RMI ConnectionExpiration-[localhost:8099]" daemon [_thread_blocked, id=5060]
0x0aa44988 JavaThread "btpool0-2" [_thread_in_native, id=3956]
0x0aa2f270 JavaThread "RMI LeaseChecker" daemon [_thread_blocked, id=4640]
0x0aa2e668 JavaThread "RMI TCP Connection(1)-47.166.94.29" daemon [_thread_in_native, id=1600]
0x0aa40d48 JavaThread "RMI Reaper" [_thread_blocked, id=4696]
0x0b20ae68 JavaThread "Timer-0" daemon [_thread_blocked, id=4688]
0x0aa294f8 JavaThread "RMI TCP Accept-0" daemon [_thread_in_native, id=4884]
0x0aa29680 JavaThread "RMI ConnectionExpiration-[47.166.94.29:4375]" daemon [_thread_blocked, id=4860]
0x0abfe318 JavaThread "btpool0-1" [_thread_in_native, id=716]
0x0ac2b1f0 JavaThread "GC Daemon" daemon [_thread_blocked, id=3588]
0x0ac26730 JavaThread "RMI RenewClean-[47.166.94.29:4375]" daemon [_thread_blocked, id=1820]
0x0ab92d70 JavaThread "btpool1-0 - Acceptor0 [email protected]:9082" [_thread_in_native, id=3168]
0x0b162be0 JavaThread "btpool0-0 - Acceptor0 [email protected]:9080" [_thread_in_native, id=5856]
0x0b0e7a18 JavaThread "RMManager-Timer-12388840" daemon [_thread_blocked, id=4328]
0x00035088 JavaThread "DestroyJavaVM" [_thread_blocked, id=4780]
0x0afc6460 JavaThread "Thread-1" [_thread_blocked, id=440]
0x0afd6768 JavaThread "Thread-0" daemon [_thread_blocked, id=4840]
0x00814cc8 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=3076]
0x00813950 JavaThread "CompilerThread0" daemon [_thread_blocked, id=3248]
0x00812cc8 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=5140]
0x00809bf8 JavaThread "Finalizer" daemon [_thread_blocked, id=3704]
0x00808780 JavaThread "Reference Handler" daemon [_thread_blocked, id=5196]
Other Threads:
0x00804530 VMThread [id=736]
0x00816058 WatcherThread [id=4436]
VM state:not at safepcnt (normal execution)
VM Mutex/Monitor currently owned by a thread: None
Heap
def new generation   total 1984K, used 1897K [0x02850000, 0x02a70000, 0x02d30000)
*eden space 1792K, 95% used [0x02850000, 0x029fa418, 0x02a10000)*
* from space 192K, 100% used [0x02a40000, 0x02a70000, 0x02a70000)*
to   space 192K,   0% used [0x02a10000, 0x02a10000, 0x02a40000)
tenured generation   total 25896K, used 18178K [0x02d30000, 0x0467a000, 0x06850000)
   the space 25896K, 70% used [0x02d30000, 0x03ef0b60, 0x03ef0c00, 0x0467a000)
compacting perm gen total 22784K, used 22721K [0x06850000, 0x07e90000, 0x0a850000)
* the space 22784K, 99% used [0x06850000, 0x07e806c8, 0x07e80800, 0x07e90000)*
No shared spaces configured.
Dynamic libraries:
0x00400000 - 0x0040d000      D:\apps\Java\jre1.5.0_14\bin\java.exe
0x7c800000 - 0x7c8c0000      C:\WINDOWS\system32\ntdll.dll
0x77e40000 - 0x77f42000      C:\WINDOWS\system32\kernel32.dll
0x77f50000 - 0x77feb000      C:\WINDOWS\system32\ADVAPI32.dll
0x77c50000 - 0x77cef000      C:\WINDOWS\system32\RPCRT4.dll
0x76f50000 - 0x76f63000      C:\WINDOWS\system32\Secur32.dll
0x77ba0000 - 0x77bfa000      C:\WINDOWS\system32\MSVCRT.dll
0x6d640000 - 0x6d7de000      D:\apps\Java\jre1.5.0_14\bin\client\jvm.dll
0x77380000 - 0x77411000      C:\WINDOWS\system32\USER32.dll
0x77c00000 - 0x77c48000      C:\WINDOWS\system32\GDI32.dll
0x76aa0000 - 0x76acd000      C:\WINDOWS\system32\WINMM.dll
0x71bc0000 - 0x71bc8000      C:\WINDOWS\system32\rdpsnd.dll
0x771f0000 - 0x77201000      C:\WINDOWS\system32\WINSTA.dll
0x71c40000 - 0x71c97000      C:\WINDOWS\system32\NETAPI32.dll
0x76b70000 - 0x76b7b000      C:\WINDOWS\system32\PSAPI.DLL
0x6d290000 - 0x6d298000      D:\apps\Java\jre1.5.0_14\bin\hpi.dll
0x6d610000 - 0x6d61c000      D:\apps\Java\jre1.5.0_14\bin\verify.dll
0x6d310000 - 0x6d32d000      D:\apps\Java\jre1.5.0_14\bin\java.dll
0x6d630000 - 0x6d63f000      D:\apps\Java\jre1.5.0_14\bin\zip.dll
0x68000000 - 0x68035000      C:\WINDOWS\system32\rsaenh.dll
0x7c8d0000 - 0x7d0cf000      C:\WINDOWS\system32\SHELL32.dll
0x77da0000 - 0x77df2000      C:\WINDOWS\system32\SHLWAPI.dll
0x77420000 - 0x77523000      C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls
                                       _6595b64144ccf1df_6.0.3790.3959_x-ww_D8713E55\comctl32.dll
0x6d4d0000 - 0x6d4e3000      D:\apps\Java\jre1.5.0_14\bin\net.dll
0x71c00000 - 0x71c17000      C:\WINDOWS\system32\WS2_32.dll
0x71bf0000 - 0x71bf8000      C:\WINDOWS\system32\WS2HELP.dll
0x71b20000 - 0x71b61000      C:\WINDOWS\System32\mswsock.dll
0x76ed0000 - 0x76efa000      C:\WINDOWS\system32\DNSAPI.dll
0x76f70000 - 0x76f77000      C:\WINDOWS\System32\winrnr.dll
0x76f10000 - 0x76f3e000      C:\WINDOWS\system32\WLDAP32.dll
0x76f80000 - 0x76f85000      C:\WINDOWS\system32\rasadhlp.dll
0x5f270000 - 0x5f2ca000      C:\WINDOWS\system32\hnetcfg.dll
0x71ae0000 - 0x71ae8000      C:\WINDOWS\System32\wshtcpip.dll
0x6d4f0000 - 0x6d4f9000      D:\apps\Java\jre1.5.0_14\bin\nio.dll
0x6d5f0000 - 0x6d5f6000      D:\apps\Java\jre1.5.0_14\bin\rmi.dll
0x10000000 - 0x10006000      C:\Program Files\a\lmv\punix.dll
0x71f50000 - 0x71f58000      C:\WINDOWS\system32\snmpapi.dll
0x0bb90000 - 0x0bb98000      C:\Program Files\a\lmv\periwin.dll
0x0bba0000 - 0x0bbab000      C:\Program Files\a\lmv\vas.dll
0x0bbb0000 - 0x0bbd0000      C:\Program Files\a\lmv\nilm.dll
0x48890000 - 0x488cd000      C:\WINDOWS\system32\ODBC32.dll
0x77530000 - 0x775c7000      C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls
                                        _6595b64144ccf1df_5.82.3790.3959_x-ww_78FCF8D0\COMCTL32.dll
0x762b0000 - 0x762f9000      C:\WINDOWS\system32\comdlg32.dll
0x76cf0000 - 0x76d0a000      C:\WINDOWS\system32\iphlpapi.dll
0x7f010000 - 0x7f134000      C:\WINDOWS\system32\MFC42u.DLL
0x77670000 - 0x777a9000      C:\WINDOWS\system32\ole32.dll
0x77d00000 - 0x77d8b000      C:\WINDOWS\system32\OLEAUT32.dll
0x77210000 - 0x772bb000      C:\WINDOWS\system32\WININET.dll
0x761b0000 - 0x76243000      C:\WINDOWS\system32\CRYPT32.dll
0x76190000 - 0x761a2000      C:\WINDOWS\system32\MSASN1.dll
0x71bb0000 - 0x71bb9000      C:\WINDOWS\system32\WSOCK32.dll
0x0bda0000 - 0x0bdb7000      C:\WINDOWS\system32\odbcint.dll
0x0bf20000 - 0x0bf61000      C:\Program Files\a\lmv\JniLib.dll
0x76cd0000 - 0x76ce9000      C:\WINDOWS\system32\MPRAPI.dll
0x76df0000 - 0x76e24000      C:\WINDOWS\system32\ACTIVEDS.dll
0x76dc0000 - 0x76de8000      C:\WINDOWS\system32\adsldpc.dll
0x76b80000 - 0x76bae000      C:\WINDOWS\system32\credui.dll
0x76a80000 - 0x76a98000      C:\WINDOWS\system32\ATL.DLL
0x76e30000 - 0x76e3c000      C:\WINDOWS\system32\rtutils.dll
0x7e020000 - 0x7e02f000      C:\WINDOWS\system32\SAMLIB.dll
0x770e0000 - 0x771e8000      C:\WINDOWS\system32\SETUPAPI.dll
0x77840000 - 0x77882000      C:\WINDOWS\system32\netman.dll
0x76300000 - 0x764c0000      C:\WINDOWS\system32\netshell.dll
0x74de0000 - 0x74df2000      C:\WINDOWS\system32\CLUSAPI.dll
0x76e90000 - 0x76ecf000      C:\WINDOWS\system32\RASAPI32.dll
0x76e40000 - 0x76e52000      C:\WINDOWS\system32\rasman.dll
0x76e60000 - 0x76e8f000      C:\WINDOWS\system32\TAPI32.dll
0x7fcf0000 - 0x7fd7e000      C:\WINDOWS\system32\WZCSvc.DLL
0x76cc0000 - 0x76cc5000      C:\WINDOWS\system32\WMI.dll
0x76d10000 - 0x76d2f000      C:\WINDOWS\system32\DHCPCSVC.DLL
0x76f00000 - 0x76f08000      C:\WINDOWS\system32\WTSAPI32.dll
0x4b180000 - 0x4b284000      C:\WINDOWS\system32\ESENT.dll
0x730a0000 - 0x730ae000      C:\WINDOWS\system32\WZCSAPI.DLL
VM Arguments:
java_command: C:\Program Files\a\lmv\CDF\b_c_lmv.jar C:\Program Files\a\lmv\CDF
Launcher Type: SUN_STANDARD
Environment Variables:
CLASSPATH=D:\a\Contact Center\Common Components\Cache\lib
PATH=C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;
C:\Program Files\Rational\ClearCase\bin;C:\Program Files\Rational\common;
C:\a\Cache\CacheSys\Mgr\a\DLL;C:\Program Files\a\lmv\TAPI;C:\Program Files\a\lmv\
OS=Windows_NT
PROCEppoR_IDENTIFIER=x86 Family 6 Model 15 Stepping 11, GenuineIntel
--------------- S Y S T E M ---------------
OS: Windows Server 2003 family Build 3790 Service Pack 2
CPU:total 4 (cores per cpu 4, threads per core 1) family 6 model 15 stepping 11, cmov, cx8, fxsr, mmx, sse, sse2
Memory: 4k page, physical 2097151k(2097151k free), swap 4194303k(3537076k free)
vm_info: Java HotSpot(TM) Client VM (1.5.0_14-b03) for windows-x86, built on Oct 5 2007 01:21:52 by "java_re" with MS VC++ 6.0
{code}
Sorry it's so long.
Anyways my dll is Jni_interface.dll. It loads legacy.dll, and its dependents. Other code also uses these libraries.
*So question 1* :
I load the jni_interface.dll (and also the legacy.dll and its dependents) library at the start of execution in a static class and so it is never unloaded. I do this because the legacy.dll will be calling functions in my Jni_Interface.dll, which are propagated into the Java class on top of it all. Does this stop other code from loading the legacy.dll or from using its functionality?
*On to question 2*:
Here is the logged output from my library, immediately before the crash:
{code:java}
      ***     JNI INTERFACE LIB - LOG 21 Jul 08 19:11:35.682     *** Log Level = DEBUG
21 Jul 08 19:11:35.698 - Level[ info ] -          Thread[ 716 ]     :: initRegistry     Registry initialisation ok
21 Jul 08 19:11:35.760 - Level[ info ] -          Thread[ 716 ]     :: vPersistData     vPersistData() called
21 Jul 08 19:11:35.823 - Level[ debug ] -     Thread[ 716 ]     :: doVoidCallback() [ persistDataHandler ]       Signature = (I)V
21 Jul 08 19:11:35.823 - Level[ debug ] -     Thread[ 716 ]     :: doVoidCallback() [ setMaxUsageHandler ]       Signature = (I)V
21 Jul 08 19:11:35.838 - Level[ info ] -          Thread[ 716 ]     :: Constructor     _instance is instantiated
21 Jul 08 19:11:35.838 - Level[ info ] -          Thread[ 716 ]     :: initiateLegacy()     JniManager initialisation successful
21 Jul 08 19:11:35.838 - Level[ info ] -          Thread[ 716 ]     :: initiateLegacy()     Initial state is NORMAL
21 Jul 08 19:11:35.838 - Level[ debug ] -     Thread[ 716 ]     :: getLicense()     Get request
21 Jul 08 19:11:36.010 - Level[ debug ] -     Thread[ 716 ]     :: getLicense()     Get request
{code}
Now notice that the current thread in the Hotspot output is NOT the thread in my library. Thread 716 is a java thread by the way. This log appears absolutely fine according to me. Also note that in the hotspot log there is no mention of my java component (the "boss" class), which is called LegacyLM. So does that mean that is in not to do with my code even though the problem only occurs when my component is included? Or is this just the cryptic nature of these problems?
*Question 3*:
If you see the heap section of the report, there are 3 items that I have highlighted that seem like very high values. Is this a possible cause of a crash? Or would I have received an "Out of space" error instead?
In terms of actual code, I cannot post much, but I can tell you what I have done to try to solve the problem:
(i) I have added mutex synchronisation to most of my shared variables.
(ii) I have used monitorEnter and MonitorExit to control callback access to my java class.
(iii) I have re-organised my code and replaced nearly every occurance of non-string character arrays with string equivalents.
(iv) I changed how I attach and detach my threads so that I only attach/detach ones that previously were not (i.e. I leave java threads alone)
As I said at the start, I am utterly confused and I don't have much of an idea about how to proceed. I'd really really appreciate a pointer or two.
Thanks in advance.
D
Edited by: Diom1982 on Jul 21, 2008 12:35 PM
Edited by: Diom1982 on Jul 21, 2008 12:40 PM

For those of you who might be interested, I found a solution to this problem (my version, at least). In my situation, this was caused by attempting to access the fields of a ActionEvent object in VC++ by casting a variant to a BSTR. While the cast "worked", it somehow caused the state of the Java plugin or the AxBridge DLL to get flummoxed, causing the VM dump far downstream.
The takehome message?
When seeing problems like this in the plugin / ActiveX bridge, do not assume that the causative error is occuring in the location noted in the stack trace. Visual C++, in all of its gory unprotected glory, gives full memory access to the DLL interface and you can do a serious fandango on the VM core. that won't necessarily bite you until later.
PS -- Sun gurus ... does this present a security violation in the Java paradigm?

Need help interpreting an Apache error message

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