Weblogic cluster consumes 100% CPU and bringing server to its knees.

I have BEA Weblogic 10.3.1 clustering as part of FMW 11g clustering. This is two node cluster on "Oracle VM" running OEL 4.0 with 4GB Memory and 4GB swap. Install seems to go with little difficulties like 100%CPU for short period but during the configuration always the Java thread consumes 100%.
Now I am at a point where shared drive is created (Chapter 5.20 of EDG) for HA FileAdapter and Persistence store. Hitting same 100% CPU problem. Looks like thread locking situation.
^-- Holding lock: java.io.InputStreamReader@6215c5d[thin lock]
^-- Holding lock: java.io.InputStreamReader@6215c5d[thin lock]
Also noticed the SWAP space is never being used though it has 4GB swap space. It brings the VM to its knees. Thanks in advance for any response.
Here is the error stack
========================
<Feb 4, 2010 8:23:56 AM EST> <Error> <WebLogicServer> <BEA-000337>
<[STUCK] ExecuteThread: '1' for queue:
'weblogic.kernel.Default (self-tuning)' has been busy for "346" seconds working on the request
"weblogic.kernel.WorkManagerWrapper$1@62171ee", which is more than the configured time (StuckThreadMaxTime) of "300" seconds.
Stack trace: Thread-22 "[STUCK] ExecuteThread: '1' for queue: 'weblogic.kernel.Default (self-tuning)'
" <alive, in native, suspended, priority=1, DAEMON>
jrockit.net.SocketNativeIO.readBytesPinned(SocketNativeIO.java:???)
jrockit.net.SocketNativeIO.socketRead(SocketNativeIO.java:31)
java.net.SocketInputStream.socketRead0(SocketInputStream.java:???)
java.net.SocketInputStream.read(SocketInputStream.java:107)
weblogic.utils.io.ChunkedInputStream.read(ChunkedInputStream.java:149)
java.io.InputStream.read(InputStream.java:85)
com.certicom.tls.record.ReadHandler.readFragment(Unknown Source)
com.certicom.tls.record.ReadHandler.readRecord(Unknown Source)
com.certicom.tls.record.ReadHandler.read(Unknown Source)
^-- Holding lock: com.certicom.tls.record.ReadHandler@6254fe1[thin lock]
com.certicom.io.InputSSLIOStreamWrapper.read(Unknown Source)
sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:250)
sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:289)
sun.nio.cs.StreamDecoder.read(StreamDecoder.java:125)
^-- Holding lock: java.io.InputStreamReader@6215c5d[thin lock]
java.io.InputStreamReader.read(InputStreamReader.java:167)
java.io.BufferedReader.fill(BufferedReader.java:105)
java.io.BufferedReader.readLine(BufferedReader.java:288)
^-- Holding lock: java.io.InputStreamReader@6215c5d[thin lock]
java.io.BufferedReader.readLine(BufferedReader.java:362)
weblogic.nodemanager.client.NMServerClient.checkResponse(NMServerClient.java:286)
weblogic.nodemanager.client.NMServerClient.checkResponse(NMServerClient.java:311)
weblogic.nodemanager.client.NMServerClient.start(NMServerClient.java:90)
^-- Holding lock: weblogic.nodemanager.client.SSLClient@62164a2[thin lock]
weblogic.nodemanager.mbean.StartRequest.start(StartRequest.java:75)
weblogic.nodemanager.mbean.StartRequest.execute(StartRequest.java:45)
weblogic.kernel.WorkManagerWrapper$1.run(WorkManagerWrapper.java:63)
weblogic.work.ExecuteThread.execute(ExecuteThread.java:198)
weblogic.work.ExecuteThread.run(ExecuteThread.java:165)
}

Few things that u can try first off
1. Turn off Native IO
2 Use this flag
-DUseSunHttpHandler=true
3. This stack seems to suggest communication wid NM
weblogic.nodemanager.client.NMServerClient.checkResponse(NMServerClient.java:286)
weblogic.nodemanager.client.NMServerClient.checkResponse(NMServerClient.java:311)
Can you stop ur Node Manger and see if it helps..
If these doesnt help, contact Oracle Support..

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+ "StartMenuExt" "Start Menu Helper Extension" "IvoSoft" "c:\windows\system32\startmenuhelper64.dll" "20.04.2014 18:16"
+ "WinRAR32" "WinRAR shell extension" "Alexander Roshal" "c:\program files\winrar\rarext32.dll" "02.12.2014 11:07"
+ "WinRAR" "WinRAR shell extension" "Alexander Roshal" "c:\program files\winrar\rarext.dll" "02.12.2014 11:07"
+ "WinSCPCopyHook" "Drag&Drop shell extension for WinSCP (64-bit)" "Martin Prikryl" "c:\program files (x86)\winscp\dragext64.dll" "14.08.2013 12:22"
I you have any clue what might be going, I would be very happy to hear it. It's really annoying, as I have to kill explorer.exe and thereby close all my folder windows when this happens.
Thank you!
Best regards,
David Trapp

Hello,
thanks for having a look. However, I already ran SFC before posting on this forum (as part of my own investigation) and it came back clean. RescueTime (a time tracking tool) is probably not the culprit because it happened also several times in the past without
RescueTime being running (that was because I had accidentally removed it from autorun at that time).
Unfortunately, I can't follow your "invalid date" explanation. I don't think an "invalid date" is anywhere involved; in fact, the method in question is called "_TreeInvalidateItemInfo" and not "_TreeInvalidDateItemInfo"
(note that there is only one "d"), so I assume its job is just to invalidate (and in turn, refresh) the cached information about nodes in the left pane's folder tree of the explorer window(s) - since the folder tree is the only NamespaceTreeControl
(whose corresponding class name is CNscTree) in explorer folder view windows. As I see it, something is causing explorer to repeatedly refresh the folder tree data, but I am stuck at finding out what exactly.
Best regards,
David Trapp
EDIT: Disassembling ExplorerFrame!CNscTree::_TreeInvalidateItemInfo confirms that, because it seems to call TreeView_SetItem for a tree node and its parent (possibly with all fields set to *_CALLBACK), and CNscTree::_UpdateItemDisplayInfo
for the parent node.
EDIT2: I'd love to dig more into the trace, however I am hitting a wall at function names/addresses. Everywhere where I would expect a function name/address (such as the "by stack" views), I only see question marks instead. What
could be the reason?

Why does my iWork update hang with zsh consuming 100% cpu?

The App Store updates for iWork Apps (Numbers, Keynote, Pages) have hung for me multiple times. After some digging, the hangs appear related to setting zsh as my default shell (Open Directory UserShell /bin/zsh). When an update is hung in App Store, Activity Monitor shows zsh is consuming ~100% cpu. Inspecting the process, it's hung on zsh -c defaults delete com.apple.helpd com.apple.helpd.sdmMapsCreated or something similar each time. If I kill the hung process enough times, eventually the update completes.
Most recently encountered updating to Numbers 3.5.2 on OS X 10.10.1 with $SHELL=/bin/zsh 5.0.5 (x86_64-apple-darwin14.0).
Possibly related to keynote not installing.
Definitely related to http://apple.stackexchange.com/questions/146919/zsh-using-100-of-cpu-during-iwor k-install. The workaround described here is the only way I've gotten through it.

You probably deleted something crucial to the stability of the operating system. I suggest backing up your important files, and doing a complete reinstall.

Some Oracle processes are consuming 100% CPU

Hi,
Some of my oracle processes are consuming most amount of cpu continuously.What are the general steps to sort out this problem.I think the query is a tuned one.

Hi,
What is your veriosn of Oracle? what is the OS? which oracle process is consuming 100% CPU? how did u find out it is conuming?
and you have mentiond query is tuned one... it does your query is taking time to execute?
there is no clarity in your question...
Regards,
Vijayaraghavan K

Oracle.exe is consuming 100% cpu o windows

Hi,
We have 6 oracle 10g database on windows box and from task manager we are able to see oracle.exe is consuming 100% cpu
Need to know this oracle.exe belongs to which database and can i get the sql for this process
Thanks

On my Vista PC, I find that the easiest way to identify which instance an oracle.exe is, is the task manager. On the Processes tab, right-click the oracle.exe and then click Go To Service(s) and that takes me to the OracleServiceORCL or whichever insance it is.
I'm sure there is a better way that a Windows person could tell us about. Then having identified the instance, it is just normal tuning from there.

JDK1.3: 100% CPU and total hanging up

Our environemt is HP-UX with 4 CPU, 2.5Gb of memory. Java is 1.3.13 (latest release). All necessary Unix patches installed.
We perform a load test over our application server with 40 users only. The test is pretty simple and doesn't deserve to be explained here (it uses no special system resources). In an unpredictable moment the java process utilizes 100% CPU and doesn't react to 'kill -3' but to 'kill -9' only. The problem is it happens whenever it wishes. No logic behind it. Every test loop takes about 1 minute to complete and the server gets stucked sometimes after 10 mins and sometimes after 3 houres of work. Changing java heap parameters and playing with new/old generation ratio also doesn't lead to any conclusion. Sometimes it happens before full gc but other settings allow full gc to happen every minute and the server works for hours.
What can it be? Any ideas? Any directions of investingation the problem?

What can it be? Any ideas? Any directions of investingation the problem?An endless do-nothing loop. I've seen HotSpot optimize such a loop to a single "jump-to-self" CPU instruction. HotSpot doesn't know how to insert a suspension safepoint into a loop that consists of a single instruction. When GC next kicks in it suspends every thread (including the signal dispatcher, which is responsible for a thread dump) but the nop-loop thread continues with free reign of the CPU.
In my case the loop looked like the following. A thread is started running this class, later another thread passes it some data by calling put(). There is no synchronization so the former thread is not obliged to see the effects of any other thread. The optimizer legally considered this loop to be do-nothing.
class ... implements Runnable {
    private Object data;
    public void put(Object data) {
        this.data = data;
    public void run() {
        while (true) {
            if (data == null) continue;
            // process data
}Since you can't get a thread dump it's very hard to pinpoint the problematic piece of code (unless you have Sun's poprietary tools that restore Java state from a core file).
If your code base is reasonably small, review it thoroughly for what can be an endless do-nothing loop. Another approach is to incrementally insert System.err.println("") into suspicious loops. This will add a call to native code and thus a suspension safepoint. Once you no longer can reproduce the problem, you must have hit the problemmatic loop. Go back and review it carefully.

CF4.5 uses 100% CPU and hangs

Hello,
According to the ColdFusion Forums my problem is not a new one but I still want
to post it with the hope to get some kind of answer.
I'm are running the following system:
CF 4.5 Enterprise Server
SiteMinder 6.0
IIS 5.0
MS SqlServer 2005
Both the CF and database server are Win2000 SP4.
About every one hours the CF server uses 100% CPU and from than on it is
impossible to log into the application. The site is still available though.
After restarting the CF service everything works fine until.....
I do not know what triggers this but I suspect it has something to do with
SiteMinder and logging onto the application.
The site has to go live on Monday so you can imagine the pressure to get
this fixed before the weekend.
Greetings,
Jilani

Jilani, you mention that this seems connected to SiteMinder. Do you mean you have your own version of SiteMinder, separate from the built-in one that came with CF 4 and 5? I wonder if there could be a conflict between them. Why are you using the full SiteMinder? And do you really need it?
More curious is that you say this spike happens every hour. Can you confirm if it's every 67 minutes, specifically? If so, then I would assert that this could be a problem related to the client variable purge process, which I discuss here:
http://www.carehart.org/blog/client/index.cfm/2006/10/4/bots_and_spiders_and_poor_CF_perfo rmance
But that may not be the issue if simply enabling/disabling the siteminder service will immediately recreate your problem....unless somehow the DB used by SiteMinder is the same DB used for client variables. Do you have any datasources listed in the CF Admin page for client variables? Any chance there's a connection between them and siteminder?
/charlie
PS This whole issue of client variables and how they can hurt you unexpectedly is something I'll dicuss this Thursday at noon US EDT, when I present "Clients and Sessions and Crashes, Oh My", to the online ColdFusion Meetup: www.coldfusionmeeetup.com.

Weblogic cluster consumes 100% CPU and bringing server to its knees.

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