Display stack trace

Env: NetWeaver 6.40 SP15
We are getting a class not found exception when we access our J2EE application under AIX. The user sees an SAP supplied error 500 page displaying:
Application error occurred during request processing.
Details: java.lang.NoClassDefFoundError: org/apache/commons/configuration/ConfigurationException
Exception id: [8A2810007002003F0000001000059048000409F3BCDA6B09]
There is no stack trace nor can I find one in the trace file via the logviewer. How do I view the stack trace? Why isn't the stack trace in the trace file?

Hi Craig,
there is a property of the HTTP service in SAP Web AS that controls whether the stack trace is displayed in the prowser or not. That's the DetailedErrorResponse property of the HTTP Provider Service on the server. Use the Visual Administrator to set that property to true. (see <a href="http://help.sap.com/saphelp_nw04/helpdata/en/a1/50b2424997c911e10000000a1550b0/frameset.htm">this</a> page from the docs as a reference.)
About your general question why this is the default - well, SAP systems are not always dev systems. In cases of productive systems, it's not quite secure to get detailed error messages (say, ones that displayed the full path to the JSP that can't be found, or one that displays the classloaders structure and references, etc.) in the browser. That's why SAP has chosen the secure behavior as default, and gives the option to enable detailed errors in the browser for development systems.
Hope that explains things a bit.

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Hello all.
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import java.awt.*;
import java.io.*;
public class thumbCanvas extends Canvas {
public int new_h=0, new_w=0;
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private double img_h, img_w;
private double ratio_h, ratio_w, ratio_thumb;
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private Image thumbImg;
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thumb_w = w;
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import java.io.*;
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* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
private void initComponents() {//GEN-BEGIN:initComponents
setLayout(null);
setBorder(new javax.swing.border.BevelBorder(javax.swing.border.BevelBorder.RAISED));
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// Variables declaration - do not modify//GEN-BEGIN:variables
// End of variables declaration//GEN-END:variables
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* WARNING: Do NOT modify this code. The content of this method is
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Sorry for putting the code here. However, I hope it can be helpful for solving my problem. Thanks again.

Thanks. The problem is already solved.
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Turning off server side stack trace in error message for weblogic81

Hi,
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Did you solve this problem? I am facing this problem and don't seem to solve with
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"Franck" <[email protected]> wrote:
>
Hi there,
In order to manage my own exceptions in some EJB, i have developped some
classes
extending Exception.
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defined in my exception classes.
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<....>
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Strange stack traces with 3.6.1-p4 with storage node restart

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2011-10-04 15:07:57,954 ERROR Coherence - 2011-10-04 15:07:57.954/838494.283 Oracle Coherence GE 3.6.1.4 <Error> (thread=DistributedCache:DefaultCacheService, member=1): An entry was inserted into the backing map for the partitioned cache "grid-service-invocation" that is not owned by this member; the entry will be removed.
ReadWriteBackingMap$InternalMapListener$1{ReadWriteBackingMap updated: key=Binary(length=31, value=0x15BD0F00004E13343139313934363537373034373337373332340141B30A40), old value=Binary(length=58, value=0x12053315BE0F0100BD0F00004E13343139313934363537373034373337373332340141B30A4001B90F000042BA7F0142972B4002644003154A00), new value=Binary(length=51, value=0x15BE0F0100BD0F00004E13343139313934363537373034373337373332340141B30A4001B90F000042BA7F0142972B40026440)}
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at com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.PartitionedService.onTransferRequestCompleted(PartitionedService.CDB:144)
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at com.tangosol.coherence.component.net.Poll.close(Poll.CDB:13)
at com.tangosol.coherence.component.net.Poll.onResponded(Poll.CDB:32)
at com.tangosol.coherence.component.net.Poll.onResponse(Poll.CDB:3)
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Thread[Proxy:ExtendTcpProxyService:TcpAcceptorWorker:18,5,Proxy:ExtendTcpProxyService:TcpAcceptor]
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:485)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.Grid.waitPolls(Grid.CDB:18)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.waitPolls(PartitionedCache.CDB:1)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.sendPartitionedRequest(PartitionedCache.CDB:69)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.getAll(PartitionedCache.CDB:12)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$BinaryMap.getAll(PartitionedCache.CDB:16)
com.tangosol.util.ConverterCollections$ConverterCacheMap.getAll(ConverterCollections.java:2477)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.grid.partitionedService.PartitionedCache$ViewMap.getAll(PartitionedCache.CDB:5)
com.tangosol.coherence.component.util.SafeNamedCache.getAll(SafeNamedCache.CDB:1)
com.tangosol.coherence.component.net.extend.proxy.NamedCacheProxy.getAll(NamedCacheProxy.CDB:1)
com.tangosol.coherence.component.net.extend.messageFactory.NamedCacheFactory$GetAllRequest.onRun(NamedCacheFactory.CDB:6)
com.tangosol.coherence.component.net.extend.message.Request.run(Request.CDB:4)
com.tangosol.coherence.component.net.extend.proxy.NamedCacheProxy.onMessage(NamedCacheProxy.CDB:11)
com.tangosol.coherence.component.net.extend.Channel.execute(Channel.CDB:39)
com.tangosol.coherence.component.net.extend.Channel.receive(Channel.CDB:26)
com.tangosol.coherence.component.util.daemon.queueProcessor.service.Peer$DaemonPool$WrapperTask.run(Peer.CDB:9)
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com.tangosol.coherence.component.util.Daemon.run(Daemon.CDB:42)
java.lang.Thread.run(Thread.java:619)

Hi,
The reason for the error message:
The backing map for a partitioned cache may only contain keys that are owned by that member. Cache requests are routed to the service member owning the requested keys, ensuring that service members will only process requests for keys which they own. This message indicates that the backing map for a cache detected an insertion for a key which is not owned by the member. This is most likely caused by a direct use of the backing-map as opposed to the exposed cache APIs in user code running on the cache server.
Check the link for more details:
http://coherence.oracle.com/display/COH35UG/Partitioned+Cache+Service+Log+Messages
Hope this helps!
Cheers,
NJ

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regards
Marcin

I'm not complaining that the exceptions declared to be thrown from session bean interface are not logged. AFAIR that is OK with the EJB spec.
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Marcin

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I ve written like this
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[2] 0xfcb014a8(0x3937450, 0x0, 0x0, 0x18e7, 0xfccbc4a8, 0x185004a4), at 0xfcb014a8
[3] 0xfdd7b1a4(0x433a70, 0x3ec720, 0xfe30b500, 0x433a70, 0xfe31f1e8, 0xfdd7adc4), at 0xfdd7b1a4
[4] 0xfdd66890(0x433a70, 0x3ec720, 0x8, 0xff1436f8, 0xfc06edb4, 0x23c428), at 0xfdd66890
[5] 0xfc1375fc(0x3ec708, 0x3, 0x3ec720, 0xfc3fddd8, 0x837568, 0x2c0468), at 0xfc1375fc
[6] 0xfc12f3c0(0x3ec708, 0x3ec860, 0x3ec860, 0x5df89a8, 0x0, 0xa770408), at 0xfc12f3c0
[7] 0xfc1d9cfc(0x3ec714, 0x3ec860, 0x8c, 0xb8, 0xfc40002c, 0xfc174638), at 0xfc1d9cfc
[8] 0xfc1d8680(0x0, 0x17, 0x3ec860, 0x2c0558, 0x5, 0x3ec714), at 0xfc1d8680
[9] 0xfc1d8998(0x3ec8a8, 0x17, 0x3ec860, 0x2c0558, 0x3, 0x5), at 0xfc1d8998
[10] 0xfc1339c4(0x3ec708, 0x17, 0x3ec860, 0xff141b0c, 0x5, 0x2c0020), at 0xfc1339c4
[11] 0xfc1341bc(0x3ec708, 0x17, 0x3ec860, 0xa770408, 0xffffff, 0xfc3fd610), at 0xfc1341bc
[12] 0xfc133878(0x3ec708, 0x12, 0x3ec860, 0xfc3f5c60, 0x0, 0xfea56158), at 0xfc133878
[13] 0xfc134b08(0xfa87bd9c, 0xfffad938, 0x0, 0x3ec708, 0xfc40017c, 0xfc3f5c60), at 0xfc134b08
[14] 0xfea7b168(0x23c428, 0x2692c0, 0x23c4c8, 0x3ec998, 0xfeb9bc61, 0xfea56158), at 0xfea7b168
[15] 0xfea80c30(0x2692c0, 0x2692c0, 0xfefecbc0, 0xfd6e2800, 0x4eaa0, 0x0), at 0xfea80c30
[16] os_thread::runThreadFunction(0x21d550, 0xfa87c000, 0x0, 0x0, 0xff141b0c, 0x1), at 0xff11309c
I am not surprised because .so does not have too many symbols to begin with. I used the manual technique to map each frame to a shared library:
1. take address of the function in each frame,
2. compare against base address of a shared library from output of "proc -map" (it shows where each so is loaded into the process).
3. see 1. falls into the range of which library displayed in 2.
4. substract base address from 1. (used for later)
After that, I went ahead to locate function, what I did was pull the exact source code and compile them without applying the linker map (still without -g0). I hope this newly compiled so is the same as the production ones in terms of function offsets:
1. nm the_faulty_so_recompiled.so
2. sorted functions in nm output by its offset,
3. compare 4. in previous step against these offsets.
but I find the result is sometimes not reliable because there is no way some of the function is called by previous frame, it is just impossible if you look at the source code.
Can someone tell me if I am doing something terribly wrong here?
BTW, parameters for each functions show in the "where" stack frames are not the same as I expected, occasionally there is something like 0x1 or 0x17, what are those?
Thanks.

but the core is not reproducible, -g0 version is not particularly helpful in that case. What I am hoping is the following:
1. the release version is compiled without -g0 and with a linker map to eliminate 99% of symbols.
2. recompiled version is with exact same source code and without -g0 and without linker map.
same compiler and everything else. I would expect the function offset is the same in those 2 cases. correct? If not, what have I done wrong?
I am ok with just knowing which function is at fault so without -g0 is ok for me. But why I am seeing stack trace still does not make sense? What is wrong with my calculation of function offset?
Is there some kind of remapping the loaded address of library going on here so I have to manually calculate some offset to get the real function offset?
Thanks.

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