System.load(PATH_TO_LIB) issue inside java package

Hi all,
sorry if this has been asked somewhere, but I just could not find any answer of it. I simply want to load a library by using System.load(ABSOLUTE_PATH_TO_LIB) and call its native function. I could get this to work if I call this function in a class without having any package to it.
However, when I moved the class into a package, e.g. com.test package, I will get java.lang.UnsatisfiedLinkError exception. I am certain the System.load could still reference to the lib I pointed to, just that the library is not really loaded and resulting in this error when I call the native method. Any help would be greatly appreciated, thanks in advance.
Sudi

Hi, thanks for the reply.
I have found the problem, the problem was not in the System.load, as I mentioned earlier, I can load the library, but I got unsatisfied link error when I call the native function inside a java package.
The reason to this is the C native function actually does not allow me to call the function from a java package. If I want to call it from a package, then I have to regenerate the header file and the C source code, namely every functions gonna have the package name follow, e.g. au_com_siab_java_helloworld. something similiar to that. Too bad, this is an existing library that I am trying to use and I don't have the source code to change. Thanks all.

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Hi
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type Exception report
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Hi All,
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[SOLVED] System load on idle is ~.30 after update

After doing an update my system load now hovers around ~.30 when idle. I have a pretty mininal system so this shouldn't be too hard to figure out. Before the update my system load would usually read 0.00 0.01 0.05 when It was idling. Now it seems to jump at random times.
Conditions which seem to produce a higher load are when:
MPD is playing a song, Having it run while stopped does nothing
A program is running that measures the system load such as htop or i3status
Firefox is running. It seems to effect the load more now (but I could be wrong on this one)
Even without X running, if I have htop or top running the system load spikes randomly. If I check it periodically with uptime the load stays at 0.
This is the pacman log from the time I last knew for sure that the load acted normal up until now:
[2012-05-11 17:51] Running 'pacman -Syu'
[2012-05-11 17:51] synchronizing package lists
[2012-05-11 17:51] starting full system upgrade
[2012-05-11 17:51] upgraded blender (3:2.63-1 -> 4:2.63a-1)
[2012-05-11 17:51] upgraded libpulse (1.1-4 -> 2.0-1)
[2012-05-11 17:51] upgraded libusb-compat (0.1.3-2 -> 0.1.4-1)
[2012-05-12 13:27] Running 'pacman -Syu'
[2012-05-12 13:27] synchronizing package lists
[2012-05-12 13:27] starting full system upgrade
[2012-05-12 13:27] upgraded cairo (1.10.2-3 -> 1.12.2-1)
[2012-05-12 13:27] upgraded openssl (1.0.1.b-1 -> 1.0.1.c-1)
[2012-05-12 13:27] upgraded git (1.7.10.1-1 -> 1.7.10.2-1)
[2012-05-12 13:27] upgraded i3status (2.5-1 -> 2.5.1-1)
[2012-05-12 13:27] upgraded java-jline (1.0-1 -> 1.0-2)
[2012-05-12 13:27] upgraded kmod (8-1 -> 8-2)
[2012-05-12 13:27] upgraded libvpx (1.0.0-1 -> 1.1.0-1)
[2012-05-12 13:27] upgraded libxi (1.6.0-1 -> 1.6.1-1)
[2012-05-12 13:27] upgraded man-pages (3.39-1 -> 3.40-1)
[2012-05-12 13:27] upgraded mpfr (3.1.0.p7-1 -> 3.1.0.p10-1)
[2012-05-12 13:27] upgraded taglib (1.7.1-1 -> 1.7.2-1)
[2012-05-12 13:27] upgraded xorg-server-common (1.12.1-1 -> 1.12.1-2)
[2012-05-12 13:27] upgraded xorg-server (1.12.1-1 -> 1.12.1-2)
[2012-05-12 19:05] Running 'pacman -Syu'
[2012-05-12 19:05] synchronizing package lists
[2012-05-12 19:05] starting full system upgrade
[2012-05-12 19:06] upgraded gtk3 (3.4.2-2 -> 3.4.3-1)
[2012-05-12 19:06] upgraded i3lock (2.4-1 -> 2.4-2)
[2012-05-12 19:06] upgraded mpg123 (1.14.1-1 -> 1.14.2-1)
I'm pretty sure things were normal after the 2012-05-12 13:27 (1st) update but I don't know for sure and I didn't want to leave anything out. I also believe the problem started after the 2012-05-12 13:27 (2nd) update but again, I didn't want to leave anything out.
Any ideas?
Last edited by dudefellaguy (2012-05-14 02:56:53)

litemotiv, luuuciano: I agree that the "solution" is not a very good one, but, taking the stated problem and context of where it was posted into consideration I think that "[SOLVED]" is appropriate. My system load no longer idles at a high number (which was the originally stated problem in the subject field) and this subforum is particular to pacman upgrading issues, not to linux kernel issues. But if you really think that I should remove the tag, then I will, because, based on your post counts, you two obviously have more forum experience than I do.

URLClassLoader slower than system loader

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Comments?

well there is quite more overhead involved - loading from classpath of course is the most optimized one.

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Hi
i created 2 packages with different name
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package user.book;
public class bookStore
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2nd package
when i call first package here i got compliation error package user.bookSold not found. Can any one hep me about this topic.
package user.bookSold;
import package user.book.bookStore;
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import java.util.*;
public class bookSold
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Thanks in advance

I really don't know why you would get a "package user.book.bookStore does not
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the import statement refers to a class not a package...
Is there some reason why you are using two packages? And why is the bookStore
class being imported when it isn't used in the bookSold class?
Perhaps you could simplify your code - remove stuff which is simply doing nothing
at the moment, and post a minimal example of the problem you are facing at the
moment. Say what the files are called, what directories they are in, and what
commands you are using to compile them (and from what directory you issue those
commands). Copy, paste and post commands and error messages, as the exact
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Hello,
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javadoc: error -Illegal package name "sysHookJNI/PollThread"
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Big thanks in advance,
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Thank you so much !!
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I am having issues with java

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golam wrote:
I am having issues with java encoding in Gentoo Linux environment. I am using java 1.6. When I ran the following test application to print french accent with encoding type, all I get is wrong character. Please provide me with some pointers. When I try this in Windows, it works perfectly. Many Thanks in advance
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àäèéêëîïôùûüÿ
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Don't assume the console character set can display these characters,
use a swing component.
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Frequent heap dumps and system load average

Dear Experts,
Performance of our development has gone worst. There has been frequent Heap Dumps and Paging, also System Load Average '/Kernel/SAPJVM/SystemProblemReporting/System Load Average' is over 133%.
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JVM parameters arememory are according to SAP recommendations
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-Xmx4096m
-XX:NewSize=1365m
-XX:MaxNewSize=1365m
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-XX:MaxPermSize=1024m
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SCS, Application and Database are on single host.
Number of nodes=2.
Physical memory size is 15GB
Appreciate your assistance in analyzing and fixing the performance issue.
Thanks,
Kumar

Hi Divyanshu,
I was away on to another project for configuring change control tool.
As mentioned earlier I don't have OS access.
But could able to download Thread Dumps via NWA as mentioned by David...., but couldn't able to open them.
Opened OOM.hprof file through MAT to check leak suspects etc. I could hardly understand as it is my first Java AS project ....here is bits and pieces from the dump analyzer tool.
Leap Suspects:
Problem Suspect 1:
The thread com.sap.engine.core.thread.execution.CentralExecutor$SingleThread @ 0x58dcd248 HTTP Worker [@662359980] keeps local variables with total size 3,66,84,54,240 (89.70%) bytes.
The memory is accumulated in one instance of "java.lang.Object[]" loaded by "<system class loader>".
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And here is the stacktrace...
HTTP Worker [@662359980]
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at oracle.jdbc.driver.OracleClobReader.needChars(I)Z (OracleClobReader.java:187)
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at com.sap.tc.webdynpro.progmodel.generation.DelegatingView.invokeEventHandler(Ljava/lang/String;Lcom/sap/tc/webdynpro/progmodel/api/IWDCustomEvent;)Ljava/lang/Object; (DelegatingView.java:142)
at com.sap.tc.webdynpro.progmodel.components.Component.fireEvent(Ljava/lang/String;Ljava/lang/String;Ljava/util/Map;)V (Component.java:492)
at com.technidata.em.facility.mgmt.wdp.InternalTabsInterface.wdFireEventInitTab(Ljava/lang/String;)V (InternalTabsInterface.java:398)
at com.technidata.em.facility.mgmt.EmissionResWinInterfaceView.onPlugIn(Lcom/sap/tc/webdynpro/progmodel/api/IWDCustomEvent;)V (EmissionResWinInterfaceView.java:97)
at com.technidata.em.facility.mgmt.wdp.InternalEmissionResWinInterfaceView.wdInvokeEventHandler(Ljava/lang/String;Lcom/sap/tc/webdynpro/progmodel/api/IWDCustomEvent;)Ljava/lang/Object; (InternalEmissionResWinInterfaceView.java:95)
at com.sap.tc.webdynpro.progmodel.generation.DelegatingWindow.invokeEventHandler(Ljava/lang/String;Lcom/sap/tc/webdynpro/progmodel/api/IWDCustomEvent;)Ljava/lang/Object; (DelegatingWindow.java:121)
please help me fix the performance issue. And let me know if I can provide some details to help you analyse further.
Thanks,
Kumar

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