Unable to Load Performance Pack / No muxer in java.library.path

When I start weblogic (version 7.0, running under jdk 1.4.1 on Win XP),
I'm getting the following error:
<Sep 30, 2002 9:03:02 AM CDT> <Error> <socket> <000433> <Unable to load
performance pack, using Java I/O instead.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at weblogic.socket.PosixSocketMuxer.<init>
(PosixSocketMuxer.java:179)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance
(NativeConstruct
orAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
(DelegatingC
onstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance
(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:306)
at java.lang.Class.newInstance(Class.java:259)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:54)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:37)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:199)
>
Can anyone tell me what this error means, and if there is a fix or
workaround? Any help will be appreciated!
Thanks,
Tim Perrigo

This happens with WebLogic every time when Windows version changes:
in 1.3.1 system property "os.name" is "windows 2000" when running on XP, and
in 1.4 it is "windows XP". Since Windows names are hardcoded somewhere in
WebLogic,
and it doesn't know anything about Windows XP, it thinks that it is running
on Unix and
attempts to load Posix performance pack (as you can see in the exception
stacktrace).
You can fix this by adding -Dos.name="windows 2000" to the command line.
"Tim Perrigo" <[email protected]> wrote in message
news:[email protected]..
When I start weblogic (version 7.0, running under jdk 1.4.1 on Win XP),
I'm getting the following error:
<Sep 30, 2002 9:03:02 AM CDT> <Error> <socket> <000433> <Unable to load
performance pack, using Java I/O instead.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at weblogic.socket.PosixSocketMuxer.<init>
(PosixSocketMuxer.java:179)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance
(NativeConstruct
orAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance
(DelegatingC
onstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance
(Constructor.java:274)
at java.lang.Class.newInstance0(Class.java:306)
at java.lang.Class.newInstance(Class.java:259)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:54)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:37)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:199)
>
Can anyone tell me what this error means, and if there is a fix or
workaround? Any help will be appreciated!
Thanks,
Tim Perrigo--
Dimitri

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Error BEA-000438 - Unable to load performance pack. Using Java I/O instead.

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 Jiffy <[email protected]> wrote:
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Hi all,
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Unable to load performance pack

Hi all,
Can anyone solve this problem.
I am starting weblogic server and it gives me message
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It starts the server but it gives me above exception also.
Thanks.
Zahid.

Zahid,
Can you please provide the server version , service pack level and the
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Thanks
[email protected] wrote:
I get the same error. Here's the error message I get:
<Jan 28, 2002 10:57:59 AM EST> <Error> <Performance Pack> <Unable to
load perfor
mance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no wlntio in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
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at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.NTSocketMuxer.<init>(NTSocketMuxer.java:173)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at
weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:126)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:232)
zahid wrote:
Hi all,
Can anyone solve this problem.
I am starting weblogic server and it gives me message
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It starts the server but it gives me above exception also.
Thanks.
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Windows2000 and JDK 1.2.2 - Unable to load performance pack

I am running Windows 2000, Weblogic 5.1 SP9 and JAVA version 1.2.2 Classic VM
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I have just migrated from Windows NT to Windows 2000.
Any assisstence would be greatly appreciated.
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BEGIN PASTE
Sat Jul 28 16:00:12 PDT 2001: <ListenThread> Listening on port: 7001
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Sat Jul 28 16:00:13 PDT 2001: <WebLogicServer> WebLogic Server started
---END PASTE---

Using same, except JDK 1.2.2_006 and no problem.
"C. Wassman" <[email protected]> wrote in message
news:3b634817$[email protected]..
>
>
>
I am running Windows 2000, Weblogic 5.1 SP9 and JAVA version 1.2.2 ClassicVM
(build JDK-1.2.2-001, native threads, symcjit)
I get the following error and I did not used to recieve the error onWindows NT.
I have just migrated from Windows NT to Windows 2000.
Any assisstence would be greatly appreciated.
Here's an excerpt from the log.
BEGIN PASTE
Sat Jul 28 16:00:12 PDT 2001: <ListenThread> Listening on port: 7001
Sat Jul 28 16:00:12 PDT 2001:<E> <Performance Pack> Unable to loadperformance
pack, using Java I/O.
Sat Jul 28 16:00:13 PDT 2001: <WebLogicServer> WebLogic Server started
---END PASTE---

Socket BEA-000438 Unable to load performance pack.....

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Anyone has any thoughts? Why would this version of Java find it difficult to load the .so files?
Thanks

 Can you post more details ?
 Sergi
 Jiffy <[email protected]> wrote:
 >error:
 > <2004-3-12 %u4E0B%u534815%u65F648%u520654%u79D2 CST> <Error> <Socket>
 ><BEA-000438> <Unable to load performance pack. Using Java I/O instead.
 >Please ensure that wlntio.dll is in: 'D:D:/bea/weblogic81/server/bin'
 >>

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-Charlie
The views expressed in this posting are solely those of the author,
and BEA Systems, Inc. does not endorse any of these views. BEA
Systems, Inc. is not responsible for the accuracy or completeness of
the information provided and assumes no duty to correct, expand
upon, delete or update any of the information contained in this
posting.
John Kroubalkian wrote:
Have a 2-processor Tru64 box with 1/2 Gig memory
WebLogic Server 5.1
When running startWebLogic.sh script I am unable to load the performance pack...the system comes up with the following messages on the console:
<A> <Posix Performance Pack> Could not initialize POSIX Performance Pack.
<E> <Performance Pack> Unable to load performance pack, using Java I/O.
uname -a ==> OSF1 cdeut2 V5.0 1094 alpha
The startup script hits the OSF1 case and sets RLDLIST environment variable. However, if we attempt to:
export RLDLIST we get the following messages:
187103:/usr/bin/sleep: /sbin/loader: Fatal Error: cannot map /opt/weblogic/lib/tru64unix
187105:/bin/ksh: /sbin/loader: Fatal Error: cannot map /opt/weblogic/lib/tru64unix
Regards,
John

Weblogic 9.2 Unable to load Performance Pack

64 bit windows running Weblogic 9.2.3
Mar 8, 2010 10:02:48 AM GMT> <Error> <Socket> <BEA-000438> <Unable to load performance pack. Using Java I/O instead.
Please ensure that wlntio.dll is in: 'C:\bea\WEBLOG~1\server\bin;.;C:\WINDOWS\system32;C:\WINDOWS;C:\bea\WEBLOG~1\server\native\win\x64\;C:\bea\WEBLOG~1\server\bin;D:\oracle\product\102~1.0\client_1\jdk\jre\bin;D:\oracle\product\102~1.0\client_1\jdk\bin;C:\bea\WEBLOG~1\server\native\win\x64\oci920_8;D:\oracle\product\10.2.0\client_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem'
>
The 64 bit dll is in the C:\bea\weblogic92\server\native\win\x64 directory.
Any ideas whats happening here?

Hi,
Please add the following JAVA_OPTIONS in your server startScript:
set JAVA_OPTIONS= %JAVA_OPTIONS% -Djava.library.path=C:\bea\weblogic92\server\native\win\x64;C:\bea\WEBLOG~1\server\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\bea\WEBLOG~1\server\native\win\x64\;C:\bea\WEBLOG~1\server\bin;D:\oracle\product\102~1.0\client_1\jdk\jre\bin;D:\oracle\product\102~1.0\client_1\jdk\bin;C:\bea\WEBLOG~1\server\native\win\x64\oci920_8;D:\oracle\product\10.2.0\client_1\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem
The above complete thing is one line without any space in it. The only space is there between %JAVA_OPTIONS% and -Djava.library.path
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Unable to load performance pack, using Java I/O.

Hi there,
I am trying to start weblogic 6.0 from jBuilder. It does start, and
working. But, I got the one problem about loading performance pack. The
message is the following. Any comment?
Thank you
----------------------------------------->Starting WebLogic Server ....
<Jun 27, 2001 1:35:13 PM EDT> <Notice> <Management> <Loading configuration
file C:\bea\wlserver6.0sp1\config\mydomain\config.xml ...>
log file:
C:\bea\wlserver6.0sp1\config\mydomain\config\config\mydomain\logs\weblogic.l
og
<Jun 27, 2001 1:35:14 PM EDT> <Info> <Logging> <Only log messages of
severity "Error" or worse will be displayed in this window. This can be
changed at Admin Console> mydomain> Servers> myserver> Logging> General>
Stdout severity threshold>
<Jun 27, 2001 1:35:46 PM EDT> <Notice> <WebLogicServer> <ListenThread
listening on port 7001>
<Jun 27, 2001 1:35:46 PM EDT> <Notice> <WebLogicServer> <WebLogic Server
started>
<Jun 27, 2001 1:35:46 PM EDT> <Error> <Performance Pack> <Unable to load
performance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no wlntio in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.NTSocketMuxer.<init>(NTSocketMuxer.java:173)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:126)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>

Thank you
But, it does not work. It does the same. Here is the message.
------------------------------------------------------------>C:\bea\jdk130\bin\javaw -classpath
"S:\Java\classes;C:\jdk1.3\jre\lib\rt.jar;S:\Java\lib\activation.jar;S:\Java
\lib\classes12.zip;S:\Java\lib\cos.jar;S:\Java\lib\dx3.0.jar;S:\Java\lib\dx3
.0-res.jar;S:\Java\lib\fscontext.jar;S:\Java\lib\j2ee.jar;S:\Java\lib\java40
.jar;S:\Java\lib\jgl3.1.0.jar;S:\Java\lib\jsdk21.jar;S:\Java\lib\junit.jar;S
:\Java\lib\mail.jar;S:\Java\lib\msclasses.zip;S:\Java\lib\rootriver.report.j
ar;S:\Java\lib\servlet.jar;S:\Java\lib\ServletExecDebugger.jar;S:\Java\lib\s
truts.jar;C:\bea\wlserver6.0sp1\lib\weblogic.jar;C:\bea\wlserver6.0sp1\lib\x
mlx.jar;C:\bea\wlserver6.0sp1\bin;C:\junit3.5\junit.jar;C:\jakarta-struts-1.
0-b1\lib\struts.jar;C:\JBuilder4\jdk1.3\demo\jfc\Java2D\Java2Demo.jar;C:\JBu
ilder4\jdk1.3\jre\lib\i18n.jar;C:\JBuilder4\jdk1.3\jre\lib\jaws.jar;C:\JBuil
der4\jdk1.3\jre\lib\rt.jar;C:\JBuilder4\jdk1.3\jre\lib\sunrsasign.jar;C:\JBu
ilder4\jdk1.3\lib\dt.jar;C:\JBuilder4\jdk1.3\lib\tools.jar" -ms64m -mx64m -
classpath
"C:\bea\wlserver6.0sp1;C:\bea\wlserver6.0sp1\bin;C:\bea\wlserver6.0sp1\lib\w
eblogic_sp.jar;C:\bea\wlserver6.0sp1\lib\weblogic.jar;S:\Java\classes;S:\Jav
a\lib\classes12.zip;C:\jakarta-struts-1.0-b1\lib\struts.jar;S:\Java\lib\dx3.
0.jar;S:\Java\lib\rootriver.report.jar;S:\Java\lib;S:\Java\lib\struts.jar;"
"-Dweblogic.RootDirectory=C:\bea\wlserver6.0sp1"
"-Dweblogic.Domain=mydomain" "-Dweblogic.Name=myserver" "-Dbea.home=c:\bea"
"-Djava.security.policy==c:\bea\wlserver6.0sp1\lib\weblogic.policy"
"-Dweblogic.management.password=password" weblogic.Server -hotspot
Starting WebLogic Server ....
<Jun 27, 2001 4:00:39 PM EDT> <Notice> <Management> <Loading configuration
file C:\bea\wlserver6.0sp1\config\mydomain\config.xml ...>
log file:
C:\bea\wlserver6.0sp1\config\mydomain\config\config\mydomain\logs\weblogic.l
og
<Jun 27, 2001 4:00:50 PM EDT> <Info> <Logging> <Only log messages of
severity "Error" or worse will be displayed in this window. This can be
changed at Admin Console> mydomain> Servers> myserver> Logging> General>
Stdout severity threshold>
<Jun 27, 2001 4:02:32 PM EDT> <Notice> <WebLogicServer> <WebLogic Server
started>
<Jun 27, 2001 4:02:32 PM EDT> <Notice> <WebLogicServer> <ListenThread
listening on port 7001>
<Jun 27, 2001 4:02:32 PM EDT> <Error> <Performance Pack> <Unable to load
performance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no wlntio in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.NTSocketMuxer.<init>(NTSocketMuxer.java:173)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:126)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>

Unable to load performance pack. Using Java I/O instead. Please ensure...

Hi there.
I am running WL 1033 development version using 64-bit 1.6.1 jdk (jdk-6u21-windows-x64) and the performance is terrible. I have upped my mem settings to this:
set MEM_ARGS=-Xms1024m -Xmx1408m -XX:PermSize=1024m -XX:MaxPermSize=1024m
and after a couple of deploys, I still get out of memory errors.
I notice this message on startup: <BEA-000438> <Unable to load performance pack. Using Java I/O instead. Please ensure that wlntio.dll is in:
Could this be part of my performace issues? If so, how do I fix it?
I followed the install directions in the README.txt file from this zip file: wls1033_dev.zip
Mike

Hi Mike,
If you are using 64 bit of Windows Operating System then Make sure that you add the following directory in the *"java.library.path"*....
Directory: E:\bea1033\wlserver_10.3\server\native\win\64
Example: In your servers start Script please add the following MEM_ARGS or in JAVA_OPTIONS:

set MEM_ARGS= -Xms1024m -Xmx1408m -XX:PermSize=1024m -XX:MaxPermSize=1024m -Djava.library.path=E:\bea1033\wlserver_10.3\server\native\win\64
Thanks
Jay SenSharma
http://middlewaremagic.com/weblogic (Middleware Magic Is Here)

Unable to load performance pack, using Java I/O instead

I'm writing because we're having some troubles with the performance pack load.
We're getting this error message when the server starts:
<Feb 1, 2005 11:30:26 AM CST> <Error> <Performance Pack> <Unable to load performance pack, using Java I/O instead.
Please ensure that libmuxer library is in /bea/jdk131/jre/bin/../lib/PA_RISC2.0/native_threads:/bea/jdk131/jre/bin/../lib/PA_RISC2.0/server:/bea/jdk131/jre/bin/../lib/PA_RISC2.0:/siven/shlib:/bea/wlserver/lib/hpux11:/bea/wlserver/lib/hpux11/oci816_8:/usr/lib
java.lang.UnsatisfiedLinkError: getBuildTime
We have checked the following things:
1.- The library libmuxer.sl exists in the path: /bea/wlserver/lib/hpux11
2.- The file has the correct privileges so it can be read by the server
3.- We've run an 'nm -o libmuxter.sl |grep getBuildTime' to ensure that the method exists in the library
We have four managed servers running in the same machine and the error message apears only in one of them.
Any idea of what might be happening?
Does any one know on what OS librarys depends libmuxer.sl?
We're running WebLogic Server 6.1 SP6 on HP-UX 11.0

That's very odd that the same machine has 4 servers and only 1 sees this
error.
I'm assuming they all have the same environment/user etc. If not,
that's the first thing you should check.
I wonder if this is a resource issue in the OS. If you start a 5th
server, does it also see this error? Is it the 4th server you start
that hits this error, or just one of the 4 you run?
-- Rob
Miguel Chavez wrote:
I'm writing because we're having some troubles with the performance pack load.
We're getting this error message when the server starts:
<Feb 1, 2005 11:30:26 AM CST> <Error> <Performance Pack> <Unable to load performance pack, using Java I/O instead.
Please ensure that libmuxer library is in /bea/jdk131/jre/bin/../lib/PA_RISC2.0/native_threads:/bea/jdk131/jre/bin/../lib/PA_RISC2.0/server:/bea/jdk131/jre/bin/../lib/PA_RISC2.0:/siven/shlib:/bea/wlserver/lib/hpux11:/bea/wlserver/lib/hpux11/oci816_8:/usr/lib
java.lang.UnsatisfiedLinkError: getBuildTime
We have checked the following things:
1.- The library libmuxer.sl exists in the path: /bea/wlserver/lib/hpux11
2.- The file has the correct privileges so it can be read by the server
3.- We've run an 'nm -o libmuxter.sl |grep getBuildTime' to ensure that the method exists in the library
We have four managed servers running in the same machine and the error message apears only in one of them.
Any idea of what might be happening?
Does any one know on what OS librarys depends libmuxer.sl?
We're running WebLogic Server 6.1 SP6 on HP-UX 11.0

Unable to load performance pack, using Java I/O on WL60, sp2

Dear friends,
I am seeking help from you. When we start WL60 SP2 on Sun Soloris 5.6, we got
the following exception:
<Jul 31, 2001 5:39:53 PM EDT> <Error> <Performance Pack> <Unable to load performance
pack, using Java I/O.
java.lang.UnsatisfiedLinkError: getFdLimit
at weblogic.socket.PosixSocketMuxer.getFdLimit(Native Method)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:104)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:128)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>
Hoever, the server itself started, and our applications runs ok
(at least so far). But this exception appears every time on some user accounts.
I was wondering what causes this exception. Some user accounts in the same machine
don't have this problem.
I also wondering if it will cause performance problem when the traffic is high.
We already applied the patches.
Any hits and suggestions are welcome.
Thanks in advance.
-Ju

Dear Deyan,
Thanks for your help. We do have $WEBLOGIC_HOME/lib/solaris in LD_LIBRARY_PATH,
which is set when running ". setEnv.sh" before startWebLogic.sh.
We failed on one patch: 105210-27, for some reason.
The strange thing is: in the same machine, all WL60 instances running under user
accounts (under /users/developers/) have no such error. But it happens under some
account, like accounts under /export/home/, etc. /user/developers is mounted on
another physical machine.
-Ju
"Deyan D. Bektchiev" <[email protected]> wrote:
>
You should have the $WEBLOGIC_HOME/lib/solaris directory in your LD_LIBRARY_PATH
so that
the server can load the performance pack (which is a shared library called
libmuxer.so).
If it is present then do a ldd libmuzer.so and you will see if any libraries
that it
depends on are missing.
Also make sure you have all of the requered patches for 2.6 installed.
--dejan
Ju Rao wrote:
Dear friends,
I am seeking help from you. When we start WL60 SP2 on Sun Soloris 5.6,we got
the following exception:
<Jul 31, 2001 5:39:53 PM EDT> <Error> <Performance Pack> <Unable toload performance
pack, using Java I/O.
java.lang.UnsatisfiedLinkError: getFdLimit
at weblogic.socket.PosixSocketMuxer.getFdLimit(Native Method)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:104)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:128)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>
Hoever, the server itself started, and our applications runs ok
(at least so far). But this exception appears every time on some useraccounts.
I was wondering what causes this exception. Some user accounts in thesame machine
don't have this problem.
I also wondering if it will cause performance problem when the trafficis high.
We already applied the patches.
Any hits and suggestions are welcome.
Thanks in advance.
-JuContent-Description: Card for Deyan D. Bektchiev
begin:vcard
n:Bektchiev;Deyan
tel;home:1-650-363-6055
tel;work:1-650-289-1046
x-mozilla-html:TRUE
url:http://www.appl.net/
org:Application Networks
adr:;;444 Ramona St;Palo Alto;CA;94301;USA
version:2.1
email;internet:[email protected]
fn:Deyan D. Bektchiev
end:vcard

"no muxer in java.library.path"

when I start the default server of the weblogic6.0 with sp1,have
the error message,
<Notice> <WebLogicServer> <WebLogic Server started>
<Notice> <WebLogicServer> <SSLListenThread listening on port 7002>
<Notice> <WebLogicServer> <ListenThread listening on port 7001>
<Error> <Performance Pack> <Unable to load performance pack, using
Java I/O.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:90)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:128)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>
help me,thanks very much.

weblogic.socket.PosixSocketMuxer ===> All Unix versions (depends on the OS, we
will load the appropriate library)
weblogic.socket.NTSocketMuxer ====> for NT
For NT, make sure $WL_HOME/bin is in your PATH environment variable.
For UNIX , make sure to specify $WL_HOME/lib/solaris in LD_LIBRARY_PATH..
Kumar
hanqj wrote:
when I start the default server of the weblogic6.0 with sp1,have
the error message,
<Notice> <WebLogicServer> <WebLogic Server started>
<Notice> <WebLogicServer> <SSLListenThread listening on port 7002>
<Notice> <WebLogicServer> <ListenThread listening on port 7001>
<Error> <Performance Pack> <Unable to load performance pack, using
Java I/O.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:90)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:128)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:224)
>
help me,thanks very much.

No muxer in java.library.path error

I get this when I try to run server6.0 on win98. can someone help me understand what is wrong?
Thanks!
<Nov 17, 2001 4:17:16 PM CST> <Error> <Performance Pack> <Unable to load perform
ance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:90)
at java.lang.Class.newInstance0(Native Method)

Ramesh & Kumar,
I got the same error when I tried to run WL Server 6.1
on my Windows 98. Here is the complete trace. Is this
error something that can be ignored because it sounds
like it is something just for performance.
<Nov 21, 2001 1:57:21 PM EST> <Error> <Performance Pack> <Unable to load perform
ance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:90)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:237)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:128)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:83)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:232)
>
<Nov 21, 2001 1:57:22 PM EST> <Notice> <WebLogicServer> <Started WebLogic Admin
Server "petstoreServer" for domain "petstore" running in Production Mode>
Looks like the petstore application is working...inspite of the
above error message.
Thanks,
Balaji.
Kumar Allamraju <[email protected]> wrote:
It appears the following stack trace is incomplete.
I can't believe the stack trace is originated from PosixSocketMuxer.
posix is only for unix platform.
In anycase before loading a performance pack we check the OS and
based on that we will load the appropriate dll/shared library.
AFAIK, performance pack is not certified on 98.
That's why it's failing.
Kumar
Ramesh wrote:
I get this when I try to run server6.0 on win98. can someone helpme understand what is wrong?
Thanks!
<Nov 17, 2001 4:17:16 PM CST> <Error> <Performance Pack> <Unable toload perform
ance pack, using Java I/O.
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1312)
at java.lang.Runtime.loadLibrary0(Runtime.java:749)
at java.lang.System.loadLibrary(System.java:820)
at weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:90)
at java.lang.Class.newInstance0(Native Method)

Re: UnsatisfiedLInkError: No muxer in java.library.path

In the default weblogic.properties file, this should be the first property
listed under the System Properties section:
# SYSTEM PROPERTIES
# System properties in this section are set to system defaults
# Performance pack. The shared library must be accessible from your
# PATH (NT) or from your shared library path (UNIX; the name of the
# variable varies: LD_LIBRARY_PATH, SHLIB_PATH, etc.)
weblogic.system.nativeIO.enable=true
Hope this helps,
Robert
Raffi Basmajian wrote:
I dont see "weblogic.system.nativeIO.enable" in the properties file - should
this attribute be added to the core section?
Joe Nykilchyk wrote:
Try setting weblogic.system.nativeIO.enable=false in weblogic.properties.
Joe
Raffi Basmajian wrote:
I get the following error when I try to start weblogic
java.lang.UnsatisfiedLinkError: no muxer in java.library.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1249)
at java.lang.Runtime.loadLibrary0(Runtime.java:470)
at java.lang.System.loadLibrary(System.java:768)
at
weblogic.socket.PosixSocketMuxer.<init>(PosixSocketMuxer.java:94)
at java.lang.Class.newInstance0(Native Method)
at java.lang.Class.newInstance(Class.java:241)
at weblogic.socket.SocketMuxer.makeTheMuxer(SocketMuxer.java:178)
at weblogic.socket.SocketMuxer.getMuxer(SocketMuxer.java:140)
at weblogic.t3.srvr.ListenThread.run(ListenThread.java:257)
Any ideas

CR087944 will fix the problem, or set the following environment varible in the setenv.bat.
set __COMPAT_LAYER=Win2000

Unable to Load Performance Pack / No muxer in java.library.path

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