Multiple jvm/instances/auto restart

Hi
I have two mid tiers and both are load balanced by BigIP load balancer .
I want to know the following
1. How can I increase the jvm process and what is it's advantages/disadvantages ?
2. Is it possible to set automatic restart feature in the Application server ?
3. In some article I found that we can create multiple oc4j instance and give the same
context root . What is the advantages/disadvantages ?
4. Is there any feature in the app sever for monitoring like if the appserver uses more resources or crashes we can send email to the administrator ?
Thanks,
Suneesh

Hello,
My answer is based on the fact that you are using OracleAS 10g (R1, 2 or 3) -which one are you using?-
OPMN: Oracle Process Management and Notification is the service in charge of starting and monitor the status of a process such as OC4J and its related JVM. Take a look to the OPMN documentation of your release. (and Administration Guide)
To have multiple OC4J that use the same context root (same application deployed) you need to have an instance with cluster enabled for several process of the same instance. Take a look to the deployment and configuration guide of your App server version.
OPMN, Clustering, and Oracle Deployment guides will answer the 4 questions you have.
Regards
Tugdual Grall

Similar Messages

Multiple JVM instances

Dear all,
I am trying to create multiple JVM instances using createJavaVM(...) but I can't do it. When I try to create the second instance, the function returns an error.
Does anybody know about getting multiple JVM instances running??
Thanks in advance,

Hallo,
createJavaVM(...) trys to create a JVM in your current
process, so I am not surprised that you get an error
the second time round, because there is already a JVM
in the process. If you want multiple JVMs, each needs
to be in its own process.
Why do you want to create more than one JVM in your
process? The JVM is multithreadable, and you can start
more than one thread in the JVM. Would that do what
you want?I need multiple instances because my application needs nearly 2Gb of memory and the maximum heap I get is 1700 Mb. I think with multiple instances, I'll get it.
Do you know about getting a bigger heap??
>
David Singleton
[email protected]

Multiple JVM instances and host computer performance

Hi,
I was wondering if anyone has any facts or sources about how running multiple JVM instances impacts the performance of the hosting computer ?
For example, say you have a long running server process that creates a JVM, how is the performance of the computer impacted if there are five of those processes running, versus ten versus ...
This is a very "it depends" question, but I would like to get an idea of the baseline performance impact that comes with running a JVM, and if there is anyone here that has experience running multiple JVMs I'd appreciate any feedback, whether it's "don't do it, ever" or "no problem!"
Thanks

My only experience with multiple VMs is when I have several Java GUI apps (eclipse, jedit, dbvisualizer) plus tomcat and maybe an ant running on XP.
I don't think that the existence of multiple VMs is in and of itself a problems, but JVMs do tend to be fairly memory hungry, so if you don't have a lot of RAM, you may find yourself crawling along as swapping heats up.
I think that later versions of the Windows VM have started to take advantage of sharing certain core libraries, or pieces of them, so that you don't have as big an incremental memory footprint for additional VMs. I don't know which versions or how much this actually reduces the foot print of second and subsequent VMs though.

SAPMMC instance auto restart

Hi,
My sapmmc java instance auto restart on it own every few minutes. What are the causes of this sympton and how to rectify this problem?
Regards
Rayden

Hi Vijith,
Here is the log
============================================================================
stdout/stderr redirect
node name   : server0
pid         : 5812
system name : J2E
system nr. : 00
started at : Thu May 22 17:52:34 2008
Reserved 1610612736 (0x60000000) bytes before loading DLLs.
[Thr 5216] MtxInit: -2 0 0
CompilerOracle: exclude com/sapportals/portal/pb/layout/taglib/ContainerTag addIviewResources
CompilerOracle: exclude com/sap/engine/services/keystore/impl/security/CodeBasedSecurityConnector getApplicationDomain
CompilerOracle: exclude com/sap/engine/services/rmi_p4/P4StubSkeletonGenerator generateStub
CompilerOracle: exclude com/sapportals/portal/prt/util/StringUtils escapeToJS
CompilerOracle: exclude com/sapportals/portal/prt/core/broker/PortalServiceItem startServices
CompilerOracle: exclude com/sap/engine/services/webservices/server/deploy/WSConfigurationHandler downloadFile
CompilerOracle: exclude com/sapportals/portal/prt/jndisupport/util/AbstractHierarchicalContext lookup
CompilerOracle: exclude com/sapportals/portal/navigation/cache/CacheNavigationNode getAttributeValue
CompilerOracle: exclude com/sapportals/portal/navigation/TopLevelNavigationiView PrintNode
CompilerOracle: exclude com/sapportals/wcm/service/ice/wcm/ICEPropertiesCoder encode
CompilerOracle: exclude com/sap/lcr/pers/delta/importing/ObjectLoader loadObjects
CompilerOracle: exclude com/sap/engine/services/webservices/jaxrpc/encoding/InstanceBuilder readElement
CompilerOracle: exclude com/sap/engine/services/webservices/jaxrpc/encoding/InstanceBuilder readSequence
CompilerOracle: exclude com/sap/engine/services/webservices/jaxrpc/encoding/TypeMappingImpl initializeRelations
CompilerOracle: exclude com/sap/engine/services/webservices/jaxrpc/encoding/GeneratedComplexType _loadInto
SAP J2EE Engine Version 7.00   PatchLevel is starting...
Error occurred while preloading classes of security providers from jre/lib/ext folder: java.util.zip.ZipException: The filename, directory name, or volume label syntax is incorrect
Loading: LogManager ... 1375 ms.
Loading: PoolManager ... 0 ms.
Loading: ApplicationThreadManager ... 375 ms.
Loading: ThreadManager ... 62 ms.
Loading: IpVerificationManager ... 47 ms.
Loading: ClassLoaderManager ... 32 ms.
Loading: ClusterManager ... 343 ms.
Loading: LockingManager ... 94 ms.
Loading: ConfigurationManager ... 9469 ms.
Loading: LicensingManager ... 31 ms.
Loading: CacheManager ... 141 ms.
Loading: ServiceManager ...
Loading services.:
Service DQE started. (15 ms).
Service runtimeinfo started. (31 ms).
Service memory started. (125 ms).
Service cross started. (250 ms).
Service timeout started. (266 ms).
Service file started. (375 ms).
Service cafeuodi~mnuacc started. (0 ms).
Service cafeucc~api started. (1156 ms).
Service trex.service started. (47 ms).
Service p4 started. (1141 ms).
Service classpath_resolver started. (171 ms).
Service userstore started. (16 ms).
Service jmx_notification started. (187 ms).
Service log_configurator started. (6484 ms).
Service locking started. (15 ms).
Service http started. (250 ms).
Service naming started. (297 ms).
Service failover started. (16 ms).
Service appclient started. (31 ms).
Service ts started. (46 ms).
Service licensing started. (15 ms).
Service javamail started. (422 ms).
Service jmsconnector started. (63 ms).
Service iiop started. (468 ms).
Service connector started. (156 ms).
Service webservices started. (734 ms).
Service deploy started. (8657 ms).
Service configuration started. (47 ms).
Service MigrationService started. (16 ms).
Service bimmrdeployer started. (15 ms).
Service dbpool started. (1547 ms).
Service cafeugpmailcf started. (31 ms).
Service com.sap.security.core.ume.service started. (844 ms).
Service security started. (734 ms).
Service shell started. (187 ms).
Service classload started. (218 ms).
Service applocking started. (203 ms).
Service tceCATTPingservice started. (16 ms).
Service servlet_jsp started. (562 ms).
Service keystore started. (546 ms).
Service telnet started. (141 ms).
Service dsr started. (531 ms).
Service ssl started. (16 ms).
Service tcsecsecurestorage~service started. (750 ms).
Service tcsecwssec~service started. (46 ms).
Service cafummetadata~imp started. (1203 ms).
Service ejb started. (1406 ms).
Service cafeugp~model started. (15 ms).
Service tceujwfuiwizsvc started. (656 ms).
Service jmx started. (3828 ms).
Service cafruntimeconnectivity~impl started. (14860 ms).
Service webdynpro started. (3547 ms).
Service cafeuer~service started. (829 ms).
Service cafumrelgroups~imp started. (2625 ms).
Service developmentserver started. (2704 ms).
Service basicadmin started. (828 ms).
Service adminadapter started. (63 ms).
Service com.sap.portal.pcd.gl started. (0 ms).
Service com.adobe~LicenseService started. (16 ms).
Service prtbridge started. (891 ms).
Service apptracing started. (1063 ms).
Service rfcengine started. (1640 ms).
Service com.adobe~DataManagerService started. (813 ms).
Service monitor started. (891 ms).
Service tcsecdestinations~service started. (4688 ms).
Service CUL started. (485 ms).
Service sld started. (4860 ms).
Service com.sap.portal.prt.sapj2ee started. (157 ms).
Service com.adobe~DocumentServicesConfiguration started. (1062 ms).
Service tcsecvsi~service started. (422 ms).
Service com.adobe~DocumentServicesLicenseSupportService started. (828 ms).
Service pmi started. (157 ms).
Service com.adobe~DocumentServicesBinaries2 started. (1297 ms).
Service com.adobe~DocumentServicesDestProtoService started. (47 ms).
Service com.adobe~TrustManagerService started. (47 ms).
Service jms_provider started. (2422 ms).
Service tc.monitoring.logviewer started. (4516 ms).
Service com.adobe~PDFManipulation started. (9829 ms).
Service com.adobe~FontManagerService started. (15282 ms).
Service com.adobe~XMLFormService started. (937 ms).
ServiceManager started for 41423 ms.
Framework started for 53924 ms.
SAP J2EE Engine Version 7.00   PatchLevel is running!
PatchLevel September 11, 2006 16:35 GMT
>
Login :### Excluding compile: com.sap.engine.services.webservices.jaxrpc.encoding.GeneratedComplexType::_loadInto
Excluding compile: com.sap.engine.services.webservices.jaxrpc.encoding.TypeMappingImpl::initializeRelations
Excluding compile: com.sap.engine.services.webservices.jaxrpc.encoding.InstanceBuilder::readSequence
Excluding compile: com.sap.engine.services.webservices.jaxrpc.encoding.InstanceBuilder::readElement
SAP J2EE Engine Version 7.00   PatchLevel is shutting down! PatchLevel September 11, 2006 16:35 GMT
Stopping services.
Service com.sap.portal.prt.sapj2ee stopped. (0 ms)
Service com.adobe~DocumentServicesDestProtoService stopped. (16 ms)
Service com.adobe~XMLFormService stopped. (15 ms)
Service cafumrelgroups~imp stopped. (0 ms)
Service com.adobe~LicenseService stopped. (0 ms)
Service jmsconnector stopped. (0 ms)
Service webdynpro stopped. (0 ms)
Service com.adobe~DocumentServicesBinaries2 stopped. (16 ms)
Service tceCATTPingservice stopped. (0 ms)
Service sld stopped. (0 ms)
Service developmentserver stopped. (0 ms)
Service tcsecvsi~service stopped. (0 ms)
Service pmi stopped. (63 ms)
Service tcsecdestinations~service stopped. (0 ms)
Service cafeuer~service stopped. (0 ms)
Service tceujwfuiwizsvc stopped. (0 ms)
Service cafeugp~model stopped. (16 ms)
Service com.adobe~TrustManagerService stopped. (0 ms)
Service tcsecwssec~service stopped. (0 ms)
Service com.adobe~DocumentServicesConfiguration stopped. (0 ms)
Service tcsecsecurestorage~service stopped. (0 ms)
Service monitor stopped. (187 ms)
Service com.sap.portal.pcd.gl stopped. (0 ms)
Service adminadapter stopped. (0 ms)
Service basicadmin stopped. (16 ms)
Service configuration stopped. (0 ms)
Service rfcengine stopped. (0 ms)
Service ejb stopped. (1391 ms)
Service com.adobe~DocumentServicesLicenseSupportService stopped. (16 ms)
Service licensing stopped. (0 ms)
Service com.adobe~PDFManipulation stopped. (0 ms)
Service com.adobe~FontManagerService stopped. (0 ms)
Service com.adobe~DataManagerService stopped. (0 ms)
Service iiop stopped. (78 ms)
Service cafummetadata~imp stopped. (0 ms)
Service applocking stopped. (0 ms)
Service ts stopped. (0 ms)
Service cafeugpmailcf stopped. (0 ms)
Service dsr stopped. (171 ms)
Service classload stopped. (0 ms)
Service prtbridge stopped. (0 ms)
Service telnet stopped. (0 ms)
Service shell stopped. (16 ms)
Service apptracing stopped. (15 ms)
Service CUL stopped. (0 ms)
Service tc.monitoring.logviewer stopped. (16 ms)
Service jms_provider stopped. (0 ms)
Service jmx stopped. (0 ms)
Service ssl stopped. (0 ms)
Service keystore stopped. (0 ms)
Service servlet_jsp stopped. (469 ms)
Service security stopped. (0 ms)
Service com.sap.security.core.ume.service stopped. (0 ms)
Service dbpool stopped. (62 ms)
Service appclient stopped. (0 ms)
Service failover stopped. (0 ms)
Service webservices stopped. (375 ms)
Service connector stopped. (63 ms)
Service javamail stopped. (0 ms)
Service naming stopped. (0 ms)
Service userstore stopped. (0 ms)
Service memory stopped. (0 ms)
Service MigrationService stopped. (0 ms)
Service file stopped. (0 ms)
Service DQE stopped. (0 ms)
Service bimmrdeployer stopped. (0 ms)
Service deploy stopped. (16 ms)
Service locking stopped. (0 ms)
Service cafeuodi~mnuacc stopped. (0 ms)
Service classpath_resolver stopped. (0 ms)
Service p4 stopped. (0 ms)
Service cross stopped. (0 ms)
Service http stopped. (0 ms)
Service cafruntimeconnectivity~impl stopped. (0 ms)
Service timeout stopped. (0 ms)
Service trex.service stopped. (0 ms)
Service cafeucc~api stopped. (0 ms)
Service log_configurator stopped. (0 ms)
Service jmx_notification stopped. (0 ms)
Service runtimeinfo stopped. (0 ms)
============================================================================
Regards
Rayden

Multiple JVm instances error in iplanet 4.1

the error message is :
info ( 1184): JVM instance has already been created within the process, numVMs=1
I have an NSAPI filter which uses JNI and will create an individual JavaVM.
I understand in the process no more than 1 JavaVM shall be initialized yet I can't find a way to attach my NSAPI filter to the JavaVM created by the iplanet server.
Does anybody has any idea how to solve this?

Thanks for your reply. It seems odd though that IWS 4.1 seems to work fine w/sdk1.4.1 on my WinNT machine???

Multiple JVM instances stop simultaneously.

We have a customer running JRE 1.5.0_8 on a Windows 2003 Server.
We have multiple java applications running in the background on this server. We keep having an intermittent problem where all of these java applications shutdown at the same time (I'm talking within the same second). It apparently is somewhat of a clean shutdown because our shutdown hooks are running; however, these programs should not be stopping. There are no dumps being created by the JVM. It happened twice yesterday, but the day before did not happen at all.
These applications are spawned into the background by a windows service we wrote and this same service will restart the application automatically when they stop in this fashion so the customer really has not noticed. Sometimes when the applications are restarted, they will stop immediately and our service will start them again and they stay running.
We have logs running on these applications and there is nothing in these logs that would suggest the applications should shutdown.
These same applications are used at other customers' sites and we do not have this problem. This is; however, the only site running 1.5.0_8, all of the others are running previous versions of the JRE.
I do not know what kind of Windows patches has been installed by the client.

ping

Since upgrading my mid-2010 MacBook Pro from the original Snow Leopard to Yosemite 10.10.2 there have been multiple instances of restart (crash) also slow operation. Any suggestions?

Since upgrading my mid-2010 MacBook Pro from the original Snow Leopard to Yosemite 10.10.2 there have been multiple instances of restart (crash) also slow operation & pop up message stating web content has failed. Any suggestions?

Many thanks for your interest, I've downloaded & run the app as suggested, report copies & pasted below.
Problem description:
Following upgrade from Snow Leopard to Yosemite 10.10.2 machine is slower & suffers from shut down / reboot and closing web pages due to unexpected error
EtreCheck version: 2.1.8 (121)
Report generated 6 February 2015 08:40:29 GMT
Download EtreCheck from http://etresoft.com/etrecheck
Click the [Click for support] links for help with non-Apple products.
Click the [Click for details] links for more information about that line.
Hardware Information: ℹ️
    MacBook Pro (15-inch, Mid 2010) (Technical Specifications)
    MacBook Pro - model: MacBookPro6,2
    1 2.4 GHz Intel Core i5 CPU: 2-core
    4 GB RAM Upgradeable
        BANK 0/DIMM0
            2 GB DDR3 1067 MHz ok
        BANK 1/DIMM0
            2 GB DDR3 1067 MHz ok
    Bluetooth: Old - Handoff/Airdrop2 not supported
    Wireless: en1: 802.11 a/b/g/n
    Battery Health: Normal - Cycle count 75
Video Information: ℹ️
    Intel HD Graphics - VRAM: 288 MB
        Color LCD 1440 x 900
    NVIDIA GeForce GT 330M - VRAM: 256 MB
System Software: ℹ️
    OS X 10.10.2 (14C109) - Time since boot: 0:13:14
Disk Information: ℹ️
    Hitachi HTS545032B9SA02 disk0 : (320.07 GB)
        EFI (disk0s1) <not mounted> : 210 MB
        Recovery HD (disk0s3) <not mounted> [Recovery]: 650 MB
        Macintosh HD (disk1) / : 318.84 GB (134.68 GB free)
            Core Storage: disk0s2 319.21 GB Online
    MATSHITADVD-R   UJ-898
USB Information: ℹ️
    BUFFALO HD-PVU2 500.11 GB
        EFI (disk2s1) <not mounted> : 210 MB
        Time Machine Backups (disk2s2) /Volumes/Time Machine Backups : 499.76 GB (257.33 GB free)
    Apple Internal Memory Card Reader
    Apple Inc. BRCM2070 Hub
        Apple Inc. Bluetooth USB Host Controller
    Apple Inc. Apple Internal Keyboard / Trackpad
    Apple Computer, Inc. IR Receiver
    Apple Inc. Built-in iSight
Gatekeeper: ℹ️
    Mac App Store and identified developers
Kernel Extensions: ℹ️
        /System/Library/Extensions
    [not loaded]    jp.co.buffalo.driver.turbousbhdd (1.0.0) [Click for support]
Launch Agents: ℹ️
    [loaded]    com.hp.help.tocgenerator.plist [Click for support]
Launch Daemons: ℹ️
    [loaded]    com.adobe.fpsaud.plist [Click for support]
User Launch Agents: ℹ️
    [loaded]    com.google.keystone.agent.plist [Click for support]
User Login Items: ℹ️
    Skype    UNKNOWN (missing value)
    Safari    Application (/Applications/Safari.app)
    Dropbox    Application (/Applications/Dropbox.app)
    Android File Transfer Agent    Application (/Users/[redacted]/Library/Application Support/Google/Android File Transfer/Android File Transfer Agent.app)
    ConnectService    Application (/Library/Application Support/ArcSoft/Connect Service/ConnectService.app)
Internet Plug-ins: ℹ️
    Flip4Mac WMV Plugin: Version: 2.4.4.2 [Click for support]
    FlashPlayer-10.6: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    QuickTime Plugin: Version: 7.7.3
    Flash Player: Version: 16.0.0.305 - SDK 10.6 [Click for support]
    Default Browser: Version: 600 - SDK 10.10
    Google Earth Web Plug-in: Version: 7.1 [Click for support]
    Silverlight: Version: 4.0.60129.0 [Click for support]
    iPhotoPhotocast: Version: 7.0
User internet Plug-ins: ℹ️
    CitrixOnlineWebDeploymentPlugin: Version: 1.0.105 [Click for support]
3rd Party Preference Panes: ℹ️
    Flash Player [Click for support]
    Flip4Mac WMV [Click for support]
Time Machine: ℹ️
    Skip System Files: NO
    Auto backup: YES
    Volumes being backed up:
        Macintosh HD: Disk size: 318.84 GB Disk used: 184.16 GB
    Destinations:
        Time Machine Backups [Local]
        Total size: 499.76 GB
        Total number of backups: 184
        Oldest backup: 2010-12-10 15:37:39 +0000
        Last backup: 2015-02-06 02:49:24 +0000
        Size of backup disk: Too small
            Backup size 499.76 GB < (Disk used 184.16 GB X 3)
Top Processes by CPU: ℹ️
         5%    WindowServer
         1%    ConnectService
         1%    Skype
         0%    systemstatsd
         0%    launchd
Top Processes by Memory: ℹ️
    193 MB    Skype
    168 MB    mds_stores
    132 MB    com.apple.WebKit.WebContent
    107 MB    Mail
    99 MB    ocspd
Virtual Memory Information: ℹ️
    889 MB    Free RAM
    1.99 GB    Active RAM
    455 MB    Inactive RAM
    825 MB    Wired RAM
    1.11 GB    Page-ins
    0 B    Page-outs
Diagnostics Information: ℹ️
    Feb 6, 2015, 08:27:32 AM    /Library/Logs/DiagnosticReports/com.apple.AmbientDisplayAgent_2015-02-06-082732 _[redacted].crash
    Feb 6, 2015, 08:25:19 AM    Self test - passed
    Feb 5, 2015, 04:37:08 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-05-163708_[redacted].crash
    Feb 5, 2015, 10:01:02 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-05-100102_[redacted].crash
    Feb 5, 2015, 12:03:59 AM    /Library/Logs/DiagnosticReports/HP Scan_2015-02-05-000359_[redacted].cpu_resource.diag [Click for details]
    Feb 4, 2015, 11:58:58 PM    /Library/Logs/DiagnosticReports/HP Scan_2015-02-04-235858_[redacted].cpu_resource.diag [Click for details]
    Feb 4, 2015, 11:54:35 PM    /Library/Logs/DiagnosticReports/HP Scan_2015-02-04-235435_[redacted].cpu_resource.diag [Click for details]
    Feb 4, 2015, 11:49:03 PM    /Library/Logs/DiagnosticReports/HP Scan_2015-02-04-234903_[redacted].cpu_resource.diag [Click for details]
    Feb 4, 2015, 09:40:16 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-214016_[redacted].crash
    Feb 4, 2015, 09:38:12 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-213812_[redacted].crash
    Feb 4, 2015, 09:27:56 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-212756_[redacted].crash
    Feb 4, 2015, 09:25:25 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-212525_[redacted].crash
    Feb 4, 2015, 09:20:16 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-212016_[redacted].crash
    Feb 4, 2015, 09:18:10 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-211810_[redacted].crash
    Feb 4, 2015, 09:12:54 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-211254_[redacted].crash
    Feb 4, 2015, 08:40:48 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-204048_[redacted].crash
    Feb 4, 2015, 08:22:04 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-202204_[redacted].crash
    Feb 4, 2015, 12:11:35 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-04-001135_[redacted].crash
    Feb 3, 2015, 09:44:33 PM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-03-214433_[redacted].crash
    Feb 3, 2015, 05:40:21 PM    /Library/Logs/DiagnosticReports/HP Scan_2015-02-03-174021_[redacted].cpu_resource.diag [Click for details]
    Feb 3, 2015, 09:05:45 AM    /Users/[redacted]/Library/Logs/DiagnosticReports/com.apple.WebKit.WebContent_20 15-02-03-090545_[redacted].crash
    Jan 28, 2015, 06:10:42 PM    /Library/Logs/DiagnosticReports/Kernel_2015-01-28-181042_[redacted].panic [Click for details]
    Jan 21, 2015, 10:51:25 PM    /Library/Logs/DiagnosticReports/Kernel_2015-01-21-225125_[redacted].panic [Click for details]
    Jan 20, 2015, 11:12:47 AM    /Library/Logs/DiagnosticReports/Kernel_2015-01-20-111247_[redacted].panic [Click for details]
    Jan 18, 2015, 09:57:31 AM    /Library/Logs/DiagnosticReports/Kernel_2015-01-18-095731_[redacted].panic [Click for details]
The only observations are that the backup drive is deemed too small and the quite long list of diagnostic reports dated between Jan 18, 2015 (which I believe is the day I upgraded to Yosemite) & today the latest Yosemite update was installed on Jan 28, 2015
Any further assistance will be appreciated

Multiple JVMs foe One WL6.1 instance

Hi,
Is it possible to attach multiple JVMs to an instance of WLS6.1
so that all JVMs will be self sufficient in serving client requests....
If it is possible then any pointers in that direction..???
regards
aseem

Each WL server runs in one JVM. If you want to have 4 JVMs, then run 4 WL
servers in one cluster.
"Aseem Rastogi" <[email protected]> wrote in message
news:[email protected]..
currently our App runs on 2 Iplanet App Server ( they are in Cluster)
and each App server has 2 VMs so we we are getting the feel of 4independent
App Servers but Physically we are able to get away with only 2 boxes.
We want to achive the same thing in Weblogic...
thanx
aseem
Michael Reiche wrote:
1) What is your requirement?
2) Clustering.
"Aseem Rastogi" <[email protected]> wrote in message
news:[email protected]..
Hi,
Is it possible to attach multiple JVMs to an instance of WLS6.1
so that all JVMs will be self sufficient in serving client
requests....
>>>
If it is possible then any pointers in that direction..???
regards
aseem

Load balancing HTTP requests for an OC4J instance w/multiple JVMs

Hello everyone,
I am using OAS 10.1.3.1 and wish to load balance HTTP requests across an OC4J group of one or more OC4J instances, where each like named OC4J instance may have multiple JVMs or it may just have one JVM.
My mod_oc4j.conf file would contain the following directives :
Oc4jSelectMethod roundrobin:local
Oc4jRoutingMode Static
Oc4JMount /xyz/* xyz
In the degenerate case, I would like to have an OC4J group with a cluster size of one, and have that one OC4J instance have two or more JVMs. I would like to be able to receive a request within my web application, determine that the JVM that has been sent the request is the wrong JVM to process the request, and then call HttpServletResponse.sendRedirect("/xyz"). Then, when the browser receives the HTTP 302 response and issues the subsequent HTTP request, have that request sent to a different JVM than the previous JVM that issued the sendRedirect().
What I have seen is that the subsequent request is sent back to the same JVM that issued the sendRedirect(). I also call invalidate() against the HttpSession prior to calling sendRedirect(), but that does not seem to affect the behavior that I see.
In the full blown case, I would have an OC4J group with a cluster size > 1, and each of those OC4J instances would have at least one JVM. In that case, I wish the sendRedirect() call to allow the subsequent request to be sent to any one of the OC4J instances in the group, and any one of those JVMs within all of those OC4J instances.
Can anyone verify that my mod_oc4j mount directive is appropriate given the select method and routing mode? What else might I need to do to have a chance to have a different JVM respond to the request that results from a sendRedirect()?
Thank you,
Doug

I should clarify that in the full blown environment, the OC4J instances that form a group will each be housed within a separate OAS instance that resides on its own machine.
So ideally, a request could be inbound to say OAS instance 1 on machine A, OC4J instance AA, JVM 2, and I need to force a redirect so that the request can actually be serviced by OAS instance 3 on machine C, OC4J instance AA, JVM 1, and I need to be able to call sendRedirect() against an HttpServletResponse from within a JVM until the subsequent request from the browser, Internet Explorer in my case, is serviced by that JVM.
Thanks,
Doug

Ensuring one singleton instance for multiple JVMs

i am creating a singleton object. But singleton is per JVM (or rather per classloader) right? But i want to ensure only one instance of my singleton even if there are multiple jvms....how can i achieve that?

javanewbie80 wrote:
i am creating a singleton object. But singleton is per JVM (or rather per classloader) right? But i want to ensure only one instance of my singleton even if there are multiple jvms....how can i achieve that?You can't.
Given computers A and B. Neither have any connectivity by any means to the other.
Install the application on both and run it. There is no way for either application to know about the other thus only one of the following is possible.
1. Both applications run and create an instance. Then there are two instances and thus it fails.
2 The application refuses to run. Then there are none and thus it fails
Other solutions are possible given that some reasonable requirements based on actual business driven needs are presented.

Multiple JVMs within app server - refresh of metdata not working

Hi guys.
We have an interesting scenario at present when running our application within a new test environment.
Our web-based application has the facility to refresh it's application metadata. This should mean that the next time the browser refreshes (or a user logs in to the application), the application will display based upon the refreshed metadata structure.
Previously, we have run our application on an app server with a single JVM without any dramas. ie. the refresh has always been reflected appropriately when viewing the application - as mentioned above.
However, we have installed the application in a new environment where the refreshing of meta data does not work consistently. That is, only about 50% of the time does the data refresh correctly. This can be seen by pressing the refresh button in an IE browser, so that the refreshed data appears approx. every second time the button is pressed. The only notable difference with this environment is that it runs 2 JVMs within the app server.
It seems that in this case, the 'old' data remains cached for the 'other' JVM, and that when the browser receives 'refreshed' data from the server, it does not always source from the same JVM.
This situation can be resolved by restarting the OC4J container, but this is not a desireable solution.
Is anyone aware of an OC4J parameter that can be set so that the 2 JVMs can run in synch so that both are refreshed appropriately when our meta data is cleared (refreshed) ? I don't believe this can be controlled within the Java source code, but I'm receptive to any other alternate solutions.
Thanks in advance.
Steve.

I'd like to embed multiple instances of the JVM within
a single, multi-threaded native server process. I'm
aware this was not possible with the Sun JDK in the
past.
Is this still true (for JDK 1.4.1 say)?Yes, this is still true.
If it's still not possible, are there any timetables
as of when it might be available? No.
Likelihood?Check the current list of JSRs at http://www.jcp.org.
Ah, btw: Is support for VM unloading (during
DestroyJavaVM()) available now?No.
>
In any case: does anybody know of a JVM
implementation
available for Linux which supports multiple VM
instances within a single process?Why do you need multiple VMs? Would multiple separate 'processes' within a single VM work? If so, have a look at:
http://www.cs.utah.edu/flux/janos/janosvm.html
http://www.javagroup.org/echidna/
Jim S.

Server, Multiple JVMs sources

Hi,
i've to create a (web serivce) server application. This application should be ready for clustering or something, if one server isn't fast enough.
I know already some things abou concurrency in Java. I'm no Java newbie. But i don't know how clustering works.
Does it depend on the used JVM?
Or is this for every server (i.e. Tomcat, JBOSS, ...) different?
What are the requirements in the webservice-layer and in the persistance layer?
Any good internet pages/PDFs which discusses this?
Any good books?
I really hope some can help me here, because it's very important for me.
Cheers,
Ingo

I just re-read the guidelines for a clustered web app over the weekend, so I think I've got things straight. Your application will have to be sensitive to two important issues:
1) A class which was previously a singleton may now be instantiated in multiple JVMs. The most obvious side effect of this is that the init() method of any servlet will have a different ServletConfig object passed to it for each JVM it is initialized in. As a result, the application context is no longer a valid place to store information, since the change to the application context is not necessarily propagated to the other JVMs. However, context-params will still be available from all JVMs. Another noticable side-effect is that static variables no longer work as expected (since there may be multiple instances of the same class).
2) The HttpSession object for a given session can only be in existence on one JVM at a time. If the HttpSession needs to migrate to another JVM, then it will be serialized and sent to the other JVM. As a result, adding an object to a session that is not Serializable may result in IllegalArgumentException being thrown. I'm guessing that in the case of a fail-over (node dies unexepectedly) that the HttpSession object is lost.
Brian

Multiple JVM's in one JDK

Hi,
I am curious to know if one JDK spawning multiple JVM's cause any memory/performance issues. The reason being, my company is planning to have number of applications running in one Weblogic Server instance with Multiple JVM's spawning out of same JDK.
Please let me know if this is possible and if there are any negative effects of following this approach.
Any help is greatly Appreciated.
Thanks

JDK installation is a just binary. There is not limit on creating number of JVM runtime process.
There should not be negative effect assuming you have enough capacity on hardware box.

Multiple Orchestration instances getting generated

I had a orchestration which query's for a particular WCF Service, If this service is live, then no issue, let's say a scenario where the
service is down, then control will goto my exception block, inside exception block i had a suspended shape, just to suspend the instance, so that when the service the up, the Biz Admin will again resume the service.
The issue we are facing is when service is down, Multiple Orchestration instances keep on generating, to talk to the service we are using a
dynamic port, we are setting the properties of the port inside expression shape "TransportType" "Address".
any pointers on resolving the issue(we just want one suspended orchestration instance) not multiple instances being generated,

It a normal behavior and happens when your receive location is being triggered by messages and your service is down .The service will give a exception and you are getting suspended messages inside your BizTalk.
Better way is to have a sequential convoy working for your Scenario having delay shape .You can also have a loop shape which will be used to auto trigger the service after the delay time specified in delay shape.
Another approach is to use ping pong tool to validate the web service . What you need to do is to add the ping pong assembly in your Orchestration and send request to web service.
https://gallery.technet.microsoft.com/WebService-PingPong-f734800e
Thanks
Abhishek

Running Multiple JVM's on same Server has OutOfMemory - PermGen Errors

I have a scenario where I have 2 application servers. One is running one JVM and the other is running multiple JVMs.
Both are configured with:
-XX:+UseConcMarkSweepGC
-XX:+UseParNewGC
-XX:MaxPermSize=256m
-XX:+CMSPermGenSweepingEnabled
-XX:+CMSClassUnloadingEnabled
The server that is running with only 1 JVM runs stable, however the server that is running multiple JVMs has frequent crashes due to OutOfMemory - PermGen errors. The only other difference is the Heap size. 512mb for each JVM on the app server with multiple instances and 1GB for the server with 1 instance. Is there a relationship/settings that need to be tuned when running multiple JVM's on the same server to avoid this?
Thx

The only other difference is the Heap size. 512mb for each JVM on the app server with multiple instances and 1GB for the server with 1 instance.This isn't a trivial difference. Basically you're saying "When I give the server 1 GB then it's okay but when I give it 512 MB it's not okay." If I saw those symptoms I would take them at face value to start with.
So, turn off one of those servers on the machine that has two. Don't change anything else. Testable prediction: That won't fix your problem.

Multiple jvm/instances/auto restart

Similar Messages

Maybe you are looking for