Automatic connection "ping" / health check in TopLink JPA ?

Some days ago we experienced problems with our underlying Oracle database, so the DB server hat to be shut down and rebootet. The application server machine (running Apache Tomcat 5.5 on a Linux OS) which provides several web-applications that are using Toplink JPA were not restarted after the DB was up again.
We encountered several subsequent "connection reset" errors within the webapps which where produced by TopLink JPA. I'd assume that this comes from the underlying restart of the DB, which invalidated/closed TopLink's JPA connection.
is there any option e.g. to be set in persistence.xml to enable a Connection-"ping" or "health check" before TopLink JPA is using the connection?
e.g.
toplink.jpa.connection.ping = "select 1 from dual";
regards,
Hans

Hans,
There is nothing built in but you can use an ExceptionHandler to handle failures and re-connect connection. This is typically only an issue when using TopLink's internal connection pooling. It is more common in a container to use its data sources and rely on them to handle connection management.
Doug

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check,
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http://www.oracle.com/technetwork/articles/sql/11g-resiliency-091703.html

Health Check in Exchange 2007 Scripting

Hi All,
I have been looking around for scripts which would help me perform regularised health checks in my enviornment. After lot of googling i was able to get a script which would meet my requirements. However i have a few challenges involved in extracting some
more information:
1. Mailbox Store Size, Free Diskspace percentage for mailbox servers
2. Remote Mail flow Tests & Mailflow test to every exchange 2007 mailbox servers in org.
3. Automating Email of collected data (in HTML) to Administrator.
4. Executing the script Automatically without triggering it from Exchange Management Shell.
Script Below
param( [string] $auditlist)
Function Get-CustomHTML ($Header){
$Report = @"
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html><head><title>$($Header)</title>
<META http-equiv=Content-Type content='text/html; charset=windows-1252'>
<meta name="save" content="history">
<style type="text/css">
DIV .expando {DISPLAY: block; FONT-WEIGHT: normal; FONT-SIZE: 8pt; RIGHT: 8px; COLOR: #ffffff; FONT-FAMILY: Arial; POSITION: absolute; TEXT-DECORATION: underline}
TABLE {TABLE-LAYOUT: fixed; FONT-SIZE: 100%; WIDTH: 100%}
*{margin:0}
.dspcont { display:none; BORDER-RIGHT: #B1BABF 1px solid; BORDER-TOP: #B1BABF 1px solid; PADDING-LEFT: 16px; FONT-SIZE: 8pt;MARGIN-BOTTOM: -1px; PADDING-BOTTOM: 5px; MARGIN-LEFT: 0px; BORDER-LEFT: #B1BABF 1px solid; WIDTH: 95%; COLOR: #000000; MARGIN-RIGHT:
0px; PADDING-TOP: 4px; BORDER-BOTTOM: #B1BABF 1px solid; FONT-FAMILY: Tahoma; POSITION: relative; BACKGROUND-COLOR: #f9f9f9}
.filler {BORDER-RIGHT: medium none; BORDER-TOP: medium none; DISPLAY: block; BACKGROUND: none transparent scroll repeat 0% 0%; MARGIN-BOTTOM: -1px; FONT: 100%/8px Tahoma; MARGIN-LEFT: 43px; BORDER-LEFT: medium none; COLOR: #ffffff; MARGIN-RIGHT: 0px; PADDING-TOP:
4px; BORDER-BOTTOM: medium none; POSITION: relative}
.save{behavior:url(#default#savehistory);}
.dspcont1{ display:none}
a.dsphead0 {BORDER-RIGHT: #B1BABF 1px solid; PADDING-RIGHT: 5em; BORDER-TOP: #B1BABF 1px solid; DISPLAY: block; PADDING-LEFT: 5px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; MARGIN-BOTTOM: -1px; MARGIN-LEFT: 0px; BORDER-LEFT: #B1BABF 1px solid; CURSOR: hand; COLOR:
#FFFFFF; MARGIN-RIGHT: 0px; PADDING-TOP: 4px; BORDER-BOTTOM: #B1BABF 1px solid; FONT-FAMILY: Tahoma; POSITION: relative; HEIGHT: 2.25em; WIDTH: 95%; BACKGROUND-COLOR: #CC0000}
a.dsphead1 {BORDER-RIGHT: #B1BABF 1px solid; PADDING-RIGHT: 5em; BORDER-TOP: #B1BABF 1px solid; DISPLAY: block; PADDING-LEFT: 5px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; MARGIN-BOTTOM: -1px; MARGIN-LEFT: 0px; BORDER-LEFT: #B1BABF 1px solid; CURSOR: hand; COLOR:
#ffffff; MARGIN-RIGHT: 0px; PADDING-TOP: 4px; BORDER-BOTTOM: #B1BABF 1px solid; FONT-FAMILY: Tahoma; POSITION: relative; HEIGHT: 2.25em; WIDTH: 95%; BACKGROUND-COLOR: #7BA7C7}
a.dsphead2 {BORDER-RIGHT: #B1BABF 1px solid; PADDING-RIGHT: 5em; BORDER-TOP: #B1BABF 1px solid; DISPLAY: block; PADDING-LEFT: 5px; FONT-WEIGHT: bold; FONT-SIZE: 8pt; MARGIN-BOTTOM: -1px; MARGIN-LEFT: 0px; BORDER-LEFT: #B1BABF 1px solid; CURSOR: hand; COLOR:
#ffffff; MARGIN-RIGHT: 0px; PADDING-TOP: 4px; BORDER-BOTTOM: #B1BABF 1px solid; FONT-FAMILY: Tahoma; POSITION: relative; HEIGHT: 2.25em; WIDTH: 95%; BACKGROUND-COLOR: #7BA7C7}
a.dsphead1 span.dspchar{font-family:monospace;font-weight:normal;}
td {VERTICAL-ALIGN: TOP; FONT-FAMILY: Tahoma}
th {VERTICAL-ALIGN: TOP; COLOR: #CC0000; TEXT-ALIGN: left}
BODY {margin-left: 4pt}
BODY {margin-right: 4pt}
BODY {margin-top: 6pt}
</style>
<script type="text/javascript">
function dsp(loc){
   if(document.getElementById){
      var foc=loc.firstChild;
      foc=loc.firstChild.innerHTML?
         loc.firstChild:
         loc.firstChild.nextSibling;
      foc.innerHTML=foc.innerHTML=='hide'?'show':'hide';
      foc=loc.parentNode.nextSibling.style?
         loc.parentNode.nextSibling:
         loc.parentNode.nextSibling.nextSibling;
      foc.style.display=foc.style.display=='block'?'none':'block';}}
if(!document.getElementById)
   document.write('<style type="text/css">\n'+'.dspcont{display:block;}\n'+ '</style>');
</script>
</head>
<body>
<b><font face="Arial" size="5">$($Header)</font></b><hr size="8" color="#CC0000">
<font face="Arial" size="1"><b>Version 1 |M & C | <A HREF='http://mail.exchange.com'>mail.exchange.com</A></b></font><br>
<font face="Arial" size="1">Report created on $(Get-Date)</font>
<div class="filler"></div>
<div class="filler"></div>
<div class="filler"></div>
<div class="save">
Return $Report
Function Get-CustomHeader0 ($Title){
$Report = @"
<div class="dspcont0">
<h1><a href="javascript:void(0)" class="dsphead0" onclick="dsp(this)">
<span class="expando">show</span>$($Title)</a></h1>
<div class="dspcont0">
Return $Report
Function Get-CustomHeader ($Num, $Title){
$Report = @"
<h2><a href="javascript:void(0)" class="dsphead$($Num)" onclick="dsp(this)">
<span class="expando">show</span>$($Title)</a></h2>
<div class="dspcont">
Return $Report
Function Get-CustomHeaderClose{
$Report = @"
  </DIV>
  <div class="filler"></div>
Return $Report
Function Get-CustomHeader0Close{
$Report = @"
  </DIV>
  <div class="filler"></div>
Return $Report
Function Get-CustomHTMLClose{
$Report = @"
</div>
</body>
</html>
Return $Report
Function Get-HTMLTable{
param([array]$Content)
$HTMLTable = $Content | ConvertTo-Html
$HTMLTable = $HTMLTable -replace '<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">', ""
$HTMLTable = $HTMLTable -replace '<html xmlns="http://www.w3.org/1999/xhtml">', ""
$HTMLTable = $HTMLTable -replace '<head>', ""
$HTMLTable = $HTMLTable -replace '<title>HTML TABLE</title>', ""
$HTMLTable = $HTMLTable -replace '<', "<"
$HTMLTable = $HTMLTable -replace '>', ">"
$HTMLTable = $HTMLTable -replace '</head><body>', ""
$HTMLTable = $HTMLTable -replace '</body></html>', ""
Return $HTMLTable
Function Get-HTMLLink ($activeURL){
$Report = @"
<a href=$activeURL>$activeURL</a>
Return $Report
Function Get-Ink ([String]$inData){
[String]$inclPercentage = @(35..100)
$positive = ($inclPercentage, 'Success', 'Ready', 'Running', 'OK', 'True', 'Information')
If ($positive -match $inData)
$Report = @"
<font color='#009900'>$inData</font>
Else
$Report = @"
<font color='#FF0000'>$inData</font>
Return $Report
Function Get-HTMLBasic ($Detail){
$Report = @"
<TABLE>
<tr>
  <td width='75%'>$($Detail)</td>
</tr>
</TABLE>
Return $Report
Function Get-HTMLDetail ($Heading, $Detail){
$Report = @"
<TABLE>
<tr>
<th width='25%'><b>$Heading</b></font></th>
<td width='75%'>$($Detail)</td>
</tr>
</TABLE>
Return $Report
$input | foreach {$targets += @($_)}
If ((Test-Path variable:\targets) -eq $True){
   Write-Host "Server list input detected on pipeline" -ForegroundColor Yellow
Else{
if ($auditlist -eq ""){
   Write-Host "No server list specified, getting all Exchange 2007 servers" -ForegroundColor Yellow
   $targets = Get-ExchangeServer | Where-Object {$_.IsExchange2007OrLater -eq $True}
  else
   if ((Test-Path $auditlist) -eq $false)
    Write-Host "Invalid server list specified: $auditlist" -ForegroundColor DarkRed
    exit
   else
    Write-Host "Using Audit list: $auditlist" -ForegroundColor Cyan
    $Targets = Get-Content $auditlist
$now = Get-Date
#Custom Expressions
$latencyMS = @{Name="Latency(MS)";expression={[Math]::Round(([TimeSpan] $_.Latency).TotalMilliSeconds)}}
$MessageLatencyTime = @{Name="MessageLatencyTime";expression={[Math]::Round(([TimeSpan] $_.Latency).TotalMilliSeconds)}}
$hotLink = @{Name="URL";expression={Get-HTMLLink ($_.URL)}}
$colourResult = @{Name="Result";expression={Get-Ink ($_.Result)}}
$colourStatus = @{Name="Status";expression={Get-Ink ($_.Status)}}
$colourType = @{Name="Status";expression={Get-Ink ($_.Type)}}
$newResult = @{Name="Result";expression={If ($_.Result.ToString() -ne 'Success'){Get-Ink ('Failure')} Else {Get-Ink ('Success') }}}
$fullReport = Get-CustomHTML "Exchange 2007 "
$fullReport += Get-CustomHTMLClose
Foreach ($Target in $Targets){
Write-Host "Collating Detail for $Target" -ForegroundColor Yellow
Write-Host "..getting basic computer configuration"
$ComputerSystem = Get-WmiObject -computername $Target Win32_ComputerSystem
switch ($ComputerSystem.DomainRole){
  0 { $ComputerRole = "Standalone Workstation" }
  1 { $ComputerRole = "Member Workstation" }
  2 { $ComputerRole = "Standalone Server" }
  3 { $ComputerRole = "Member Server" }
  4 { $ComputerRole = "Domain Controller" }
  5 { $ComputerRole = "Domain Controller" }
  default { $ComputerRole = "Information not available" }
$OperatingSystems = Get-WmiObject -computername $Target Win32_OperatingSystem
$TimeZone = Get-WmiObject -computername $Target Win32_Timezone
$Keyboards = Get-WmiObject -computername $Target Win32_Keyboard
$SchedTasks = Get-WmiObject -computername $Target Win32_ScheduledJob
$BootINI = $OperatingSystems.SystemDrive + "boot.ini"
$RecoveryOptions = Get-WmiObject -computername $Target Win32_OSRecoveryConfiguration
$exServer = Get-ExchangeServer | where {$_.Name -eq "$Target"}
$exVersion = "Version " + $exServer.AdminDisplayVersion.Major + "." + $exServer.AdminDisplayVersion.Minor + " (Build " + $exServer.AdminDisplayVersion.Build + "." + $exServer.AdminDisplayVersion.Revision + ")"
switch ($ComputerRole){
  "Member Workstation" { $CompType = "Computer Domain"; break }
  "Domain Controller" { $CompType = "Computer Domain"; break }
  "Member Server" { $CompType = "Computer Domain"; break }
  default { $CompType = "Computer Workgroup"; break }
$LBTime=$OperatingSystems.ConvertToDateTime($OperatingSystems.Lastbootuptime)
$MyReport += Get-CustomHeader0 "$Target - Role(s): $($exServer.ServerRole)"
$MyReport += Get-CustomHeader "2" "Basic Server Information"
  $MyReport += Get-HTMLDetail "Computer Name" ($ComputerSystem.Name)
  $MyReport += Get-HTMLDetail "Computer Role" ($ComputerRole)
  $MyReport += Get-HTMLDetail "Exchange Role(s)" ($exServer.ServerRole)
  $MyReport += Get-HTMLDetail "Last System Boot" ($LBTime)
  $MyReport += Get-CustomHeaderClose
  Write-Host "..getting logical disk configuration"
  $Disks = Get-WmiObject -ComputerName $Target Win32_LogicalDisk
  $MyReport += Get-CustomHeader "2" "Logical Disk Configuration"
   $LogicalDrives = @()
   Foreach ($LDrive in ($Disks | Where {$_.DriveType -eq 3})){
    $Details = "" | Select "Drive Letter", Label, "File System", "Disk Size (GB)", "Disk Free Space", "% Free Space"
    $Details."Drive Letter" = $LDrive.DeviceID
    $Details.Label = $LDrive.VolumeName
    $Details."File System" = $LDrive.FileSystem
    $Details."Disk Size (GB)" = [math]::round(($LDrive.size / 1GB))
    $Details."Disk Free Space" = [math]::round(($LDrive.FreeSpace / 1GB))
    $Details."% Free Space" = Get-Ink ([Math]::Round(($LDrive.FreeSpace /1GB) / ($LDrive.Size / 1GB) * 100))
    $LogicalDrives += $Details
   $MyReport += Get-HTMLTable ($LogicalDrives)
  $MyReport += Get-CustomHeaderClose
  if ($exServer.ServerRole -like "*ClientAccess*")
  {$MyReport += Get-CustomHeader "2" "OWA Connectivity"
   Write-Host "..performing OWA connectivity test"
   $colOWAResults = Test-OwaConnectivity -ClientAccessServer $Target
   $MyReport += Get-HTMLTable ($colOWAResults | select MailboxServer, $hotLink, Scenario, $colourResult, $latencyMS, Error)
   $MyReport += Get-CustomHeaderClose
Write-Host "..getting queue details"
  if ($exServer.ServerRole -like "*HubTransport*")
  $MyReport += Get-CustomHeader "2" "Queue Information"
  $colQs = Get-Queue -server $Target
  $MyReport += Get-HTMLTable ($colQs | Select-Object NextHopDomain, $colourStatus, MessageCount, NextRetryTime)
  $MyReport += Get-CustomHeaderClose
  Write-Host "..getting mailbox database information"
  $spaceLog=[System.Diagnostics.EventLog]::GetEventLogs($target) | where {($_.LogDisplayName -eq "Application")}
  $db = @{Name="database";Expression={$_.ReplacementStrings[1]}}
  $freeMB = @{Name="MB";Expression={[int]$_.ReplacementStrings[0]}}
  $whiteSpace = $spaceLog.entries | where {($_.TimeWritten -ge $now.AddDays(-1))} | where {($_.EventID -eq "1221")} | select $db,$freeMB
  $ws = @{Name="White Space";expression={}}
  if ($exServer.ServerRole -like "*Mailbox*")
   $MyReport += Get-CustomHeader "2" "Mailbox Stores"
   $colMailboxStores = Get-MailboxDatabase -Server $Target -Status | Sort-Object Name
   $storeTable = @()
   Foreach ($objMailboxStore in $colMailboxStores)
    [string]$totalUsers = (get-mailbox -database $objMailboxStore).count
    [string]$empty = $totalUsers.Length -eq 0
    if ($empty -eq 'True')
     [string]$totalUsers = "0"
    $storeDetails = "" | Select Name, Mounted, "Total Users", "White Space", LastFullBackup
    $storeDetails.Name = $objMailboxStore.Name
    $storeDetails.Mounted = Get-Ink ($objMailboxStore.Mounted)
    $storeDetails."Total Users" = $totalUsers
    $storeDetails."White Space" = (($whitespace | where {$_.database -match $objMailboxStore.Name} | select -last 1).mb)
    $storeDetails.LastFullBackup = $objMailboxStore.LastFullBackup
    $storeTable += $storeDetails
    $MyReport += Get-HTMLTable ($storeTable)
   $MyReport += Get-CustomHeaderClose
   $MyReport += Get-CustomHeader "2" "MAPI Connectivity"
   Write-Host "..performing MAPI connectivity test"
   $colMAPIResults = Test-MAPIConnectivity -Server $Target
    $MyReport += Get-HTMLTable ($colMAPIResults | select Database, $newResult, $latencyMS, Error)
   $MyReport += Get-CustomHeaderClose
   $MyReport += Get-CustomHeader "2" "Mailflow Test"
   Write-Host "..performing Mailflow test"
   $colMailflowResults = Test-Mailflow -Server $Target
    $MyReport += Get-HTMLTable ($colMailflowResults | select TestMailflowResult, $MessageLatencyTime)
   $MyReport += Get-CustomHeaderClose
  Write-Host "..getting Exchange services"
  $ListOfServices = (gwmi -computer $Target -query "select * from win32_service where Name like 'MSExchange%' or Name like 'IIS%' or Name like 'SMTP%' or Name like 'POP%' or Name like 'W3SVC%'")
  $MyReport += Get-CustomHeader "2" "Exchange Services"
   $Services = @()
   Foreach ($Service in $ListOfServices){
    $Details = "" | Select Name,Account,"Start Mode",State,"Expected State"
    $Details.Name = $Service.Caption
    $Details.Account = $Service.Startname
    $Details."Start Mode" = $Service.StartMode
    If ($Service.StartMode -eq "Auto")
      if ($Service.State -eq "Stopped")
       $Details.State = $Service.State
       $Details."Expected State" = Get-Ink ("Unexpected")
     If ($Service.StartMode -eq "Auto")
      if ($Service.State -eq "Running")
       $Details.State = $Service.State
       $Details."Expected State" = Get-Ink ("OK")
     If ($Service.StartMode -eq "Disabled")
      If ($Service.State -eq "Running")
       $Details.State = $Service.State
       $Details."Expected State" = Get-Ink ("Unexpected")
     If ($Service.StartMode -eq "Disabled")
      if ($Service.State -eq "Stopped")
       $Details.State = $Service.State
       $Details."Expected State" = Get-Ink ("OK")
     If ($Service.StartMode -eq "Manual")
      $Details.State = $Service.State
      $Details."Expected State" = Get-Ink ("OK")
     If ($Service.State -eq "Paused")
      $Details.State = $Service.State
      $Details."Expected State" = Get-Ink ("OK")
    $Services += $Details
    $MyReport += Get-HTMLTable ($Services)
   $MyReport += Get-CustomHeaderClose
    $eventLogs=[System.Diagnostics.EventLog]::GetEventLogs($Target) | where {($_.LogDisplayName -eq "Application") -OR ($_.LogDisplayName -eq "System")}
    $warningEvents = @()
    $errorEvents = @()
    $LogSettings = @()
$MyReport += Get-CustomHTMLClose
$fullReport += $MyReport
$MyReport = $null
$Date = Get-Date
$Filename = ".\" + "Exchange_Health" + "_" + $date.Hour + $date.Minute + "_" + $Date.Day + "-" + $Date.Month + "-" + $Date.Year + ".htm"
$fullReport | out-file -encoding ASCII -filepath $Filename
Write "Audit saved as $Filename"
Invoke-Item $Filename

please refer to my scripts below, it should get you started.
http://www.myexchangeworld.com/2010/03/powershell-disk-space-html-email-report/
http://www.myexchangeworld.com/2010/07/powershell-script-to-monitor-exchange-server-2010-services-email-report/
you can customsise this to your needs and add relevant information.
cheers
thiyagu
Thiyagu | MCTS/MCITP - Exchange 2007 | MCSE 2003[Messaging] | http://www.myExchangeWorld.com. This posting is provided "AS IS" with no warranties, and confers no rights.

How to health check time capsule disk

how to health check time capsule disk?
when doing time machine backuping and copying files into time capsule, it would take ages and very long time.. is the disk going to die soon?
is there anyway i can check the disk?
my time capsule is 2TB current model.
please help.
thank you.

Time Machine automatically checks the backups on the disk. It does a quick check (a few seconds) before every backup, and periodically (every month, I think) does a much more thorough check.
You can do that yourself, by holding the Alt/Option key while selecting the TM icon in your menubar, and selecting Verify Backups. That may take quite a while, if you have a lot of data. I'd recommend connecting via Ethernet, as it will still be slow, but 2-3 times faster than WIFI.

Toplink JPA Deployment problem in OC4J

Hi all ,
we are having problem in deployment for an toplink JPA program in OC4J 10.1.3 .. We are using toplink essesntial and our deployed EAR structure is
aaplication.xml
rmwtoplink.war
the content of application.xml is as
<display-name>rmwtoplink</display-name>
<module>
<web>
<web-uri>rmwtoplink.war</web-uri>
<context-root>rmwapplist</context-root>
</web>
</module>
the content of war file as below :
web-inf\web.xml
web-inf\classes\META-INF\persistence.xml
web-inf\classes\<classes>
web-inf\gnf\<jsp pages>
when ever a pages are called those do not use entity manager / jpa call are loading perfectly , but the pages which have used jpa are nt diplayed , we check the error messages , it just halts after following codes :
EntityManagerFactory emf =
Persistence.createEntityManagerFactory(jpaSource);
It seems there is no exception that is even thrown in page or opmn log .
The same program is running fine in Jdveloper 10.1.3 /
Is there any way where we can get the actual error message ?
we are using toplink.jdbc.url for connecting the database .

Here is little more insight for the problem , further check reveals that :
start connecting rmwtest
exception occured for connection test , Exception [TOPLINK-4002] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.DatabaseException
Internal Exception: java.sql.SQLException: Listener refused the connection with the following error:
ORA-12514, TNS:listener does not currently know of service requested in connect descriptor
The Connection descriptor used by the client was:
//localhost:1521/ORCL
we do not have any idea how is localhost:1521/ORCL picked up , in our persistence.xml we have
where as rmwtest defined in persistence.xml as
<persistence-unit name="rmwtest" transaction-type="RESOURCE_LOCAL">
<provider>oracle.toplink.essentials.PersistenceProvider</provider>
<class>rmw.gnf.entity.ServSesnUser</class>
<class>rmw.gnf.entity.RmwData</class>
<class>rmw.gnf.entity.GnfData</class>
<properties>
<property name="toplink.logging.level" value="FINEST"/>
<property name="toplink.jdbc.driver" value="oracle.jdbc.driver.OracleDriver"/>
<property name="toplink.jdbc.url" value="jdbc:oracle:thin:@middb.1dc.com:1621:ukdbins"/>
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Toplink\JPA vs JDBC - Toplink died for my app with 5000 users

Hi All Just a quick question about performance when comparing toplink jpa ans jdbc.
I have an app I just develpoed using toplink for all data acces that will have approx 5000 users and initial testing with 200 things look good. However after launch and going live for 5000 people the app blew up. Lot's of memory heap errors, and TopLink exceptions...
To make things work I have replaced all the toplink with traditional JDBC, this works but I am currious as to why toplink blew up? I notice when JDev creates the Toplink code that it never does any checking for open connections and never explicitly closes connections. Is this something that I have to do?
I should not that I was not using datacontrols directly, I created a datacontrol but then ised the FacesContext to create a list of results in the backing bean??
Anyway, I know that's not a great description but I thought I would throw this question out there and see what people had to say?
Thanks
J

It is hard to say where a memory issue occurred. Normally usage of a memory profiler such as JRockit JRA, or JProfiler is useful in debugging such issues.
There were a couple related memory issues in previous releases, so ensure you have the latest release or patch release.
Using an isolated (shared=false) or weak cache may also help.
In general you should be able to scale to 5000 users without any issues.
James : http://www.eclipselink.org

A10 Network and Siebel HTTP Health Check @ Application Tier

Hello,
I have a simple question around using the A10 network appliance and performing a simple HTTP Get Health, from the third party load balance, check against the ScBroker component. For example, within the A10 we would create a check check using the following: This is for third party load balancing at the application tier. I have performed this type of health check on other competitor devices such as F5, Cisco etc.
//IP Address of Siebel Application Server/Siebel Enterprise Name/ScBroker.
When I test the below HTTP Get health check both inside and outside the load balancer (using any web browser) I receive about 15-20 errors before receiving a ScBroker Status "Ok" message. This is a older version of Siebel (8.0.0.12) and I have double checked the Connection Forward algorithm for SCBroker which is set to "LL" least laden. The only other option would be to perform a health check at the TCP (SCBroker port 2321) layer which can cause multiple LB errors and leave connections missed at the port 2321 SCBroker layer. Essentially, A HTTP Get Health check at the application layer is the way to go. Has anyone experienced this error on the HTTP Get Health check? If so, what was the resolution for the health check.

Hi zryan,
Your question is not clear enough.
If you want to use create client for transporting HTTP or SMTP messages, you can utilize these built-in classes in .Net Framework:
WebClient,
HttpWebRequest Class
SmtpClient Class
If you mean you want to intercept the network messages using C# code, please note the topic in this thread:
Contributors: How to avoid aiding
the development of malicious code
.Net Framework doesn't contain built-in objects for you to automatically detect the protocol of the network message.
We are trying to better understand customer views on social support experience, so your participation in this interview project would be greatly appreciated if you have time. Thanks for helping make community forums a great place.
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How to health-check james server

as subject. want to have a process to health-check james server to see whether it's alive or not?
any ideas?
can we telnet the pop3 port of it and see any standard reply message to see it? thanks!

Time Machine automatically checks the backups on the disk. It does a quick check (a few seconds) before every backup, and periodically (every month, I think) does a much more thorough check.
You can do that yourself, by holding the Alt/Option key while selecting the TM icon in your menubar, and selecting Verify Backups. That may take quite a while, if you have a lot of data. I'd recommend connecting via Ethernet, as it will still be slow, but 2-3 times faster than WIFI.

How come my macbook Pro doesn't automatically connect to my wifi when it is saved under known networks?

How come my macbook Pro doesn't automatically connect to my wifi when it is saved under known networks and i have the box checked under network settings?

Random35,
does your wi-fi router filter access by MAC address? If it does, then have you added your MacBook Pro’s MAC address to your router’s whitelist of acceptable MAC addresses?

Macbook no longer automatically connects to wireless

Hi There - I have a macbook (That I love). Just in the past few weeks since the last OS update I've had problems with my airport. Usually when you open your computer from sleep it automatically connects back to your wireless network. Mine no longer does. i have checked all my wireless settings and my WEP password is still there. If I click on airport and select my network I connect, but it doesn't do it automatically. I have seen a number of other people with the same problem....is anyone else having this issue? How do you solve it?
Here's some other references I found:
http://forums.macosxhints.com/showthread.php?t=61850
http://macosx.com/forums/mac-os-x-system-mac-software/281192-mac-will-not-automa ticcaly-connect-wireless-network.html
possible solution: http://discussions.apple.com/thread.jspa?messageID=3240817&#3240817
Macbook Mac OS X (10.4.8)

I am having the same issue here. I have followed the suggested fixes, to no avail. Here's a run down of my symptoms, attempted fixes, and the "fix."
when coming out of sleep, my wireless connection no longer works. i can connect to a neighbors, but when i attempt to switch back to mine, nada. airport status shows it is connected with full reception. no internet. no network connect. i got nada.
rebooted the router. nada. rebooted the cable modem. nada. rebooted modem, then the router. nada. (d-link DI-624. also had the Linksys WRTXXX)
attempted this fix: http://docs.info.apple.com/article.html?artnum=304482 nada
in order to establish a connection, i go through the following:
- when the macbook comes out of sleep, i open safari and get the network diagnostic screen prompt.
- i turn off airport, shut down safari, then turn airport back on.
- reopen safari and get the network diagnostic prompt.
- go get a cup of coffee, nature break, etc.
- come back and my internet start up page is USUALLY waiting on me.
the problem with this, is that the connection is usually DROPPED five to ten minutes into the connection and everything above is REPEATED.
my solution? as much as i hate to say it, use the PC. it doesn't have this problem. Apple needs to address this issue with a firmware upgrade NOW.
MacBook 2GHz Core Duo Mac OS X (10.4.8)
MacBook 2 GHz Core Duo Mac OS X (10.4.8)
MacBook 2 GHz Core Duo Mac OS X (10.4.8)

HT4623 iPad air won't automatically connect to wi fi unless I turn off and back on again??

My iPad air will not automatically connect to wi fi unless I turn off and then back on again, any suggestions as to why?

Hello Juanita289
Check out the article below to troubleshoot issues with connecting to WI-Fi. You may want to reset the Network Settings by going to Settings > General > Reset > Reset Network Settings. It will not delete remove any personal data besides and known Wi-Fi networks that you have joined in the past.
iOS: Troubleshooting Wi-Fi networks and connections
http://support.apple.com/kb/ts1398
Regards,
-Norm G.

How can I support a health check, from a load balancer?

My company has load balancers which use health checks to determine if the end point is available for client traffic. The basic health check is a tcp ping, and will tell you if the device is on the network. The next level of health check is an http request. This request, and the response are static, you can’t create your own version of the request and response. The standard request is this:
     http://host:port/healthcheck/hc.html
The standard response is this:
     “The server is available”
I want to use the load balancer as part of my total deployment. The problem is that I am not seeing how to support this health check request and response in the MDEX engine. What I see is this request
     http://host:port/admin?op=ping
Will return this response
     dgraph <host>: <port> responding at <day month year time>
It is nice that there is a built in ping, but I am not able to make use of it. I am new to Endeca and still poking around. The dgraph process listens on a port set up in <…>/config/script/AppContext.xml
<dgraph id="Dgraph1" host-id="MDEXHost" port="3281">
<properties>
<property name="restartGroup" value="A" />
<property name="updateGroup" value="a" />
</properties>
<log-dir>./logs/dgraphs/Dgraph1</log-dir>
<input-dir>./data/dgraphs/Dgraph1/dgraph_input</input-dir>
<update-dir>./data/dgraphs/Dgraph1/dgraph_input/updates</update-dir>
</dgraph>
(I am not using the default port, as I only have an instance on a shared server and have to worry about port clashing. But that is a different thread.)
In a standard tc Server install I can support this health check by doing this:
* Create a directory named “healthcheck”, in the “webapps” directory.
* Place a file name “hc.html” in that directory, which contains “The server is available”
The one hack which comes to mind is to write a servlet which would be able to be a smart proxy for the load balancer health check. It would pass along any regular traffic to the MDEX engine. But if the request was a health check it would send “admin?op=ping” to the MDEX engine, and for a good response from the engine, create and pass back the correct response to the load balancer.
Ideas, comments, flames, …
Thanks

Hi, we are using following String to test the MDEX ping response but we get the invalid version formation on dgraph.log -
following is on F5
GET /admin?op=ping HTTP/1.1/r/nHost:myhost.endeca.com:19000/r/nConnection:close/r/n/r/n
Following gets logged on Dgraph.log
WARN 09/05/12 05:30:03.799 UTC (1346823003799) DGRAPH {dgraph} Invalid version format in 'HTTP/1.1/r/nHost:myhost.endeca.com:19000/r/nConnection:close/r/n/r/n'
Please let me know - if you have any suggestions to solve this issue.
I know that it works from browser and wget from unix with following commands.
wget http://myhost.endeca.com:19000/admin?op=ping - from unix command line
from browser:
http://myhost.endeca.com:19000/admin?op=ping
Thanks,
Ram

PC will not automatically connect to wireless network on startup...

Hi all - I have a WRTG54 wirless router with the latest firmware. Windows XP Home SP2. I have a mixed network with two wired PCs and one wireless. The wireless PC will not automatically connect to the network. To connect to the network i have to go to the wireless network properties box and check "let windows automatically configure network" Once I do this the wirelss PC connects with no problem. Unfortunatley, whenever i turn the PC off and turn it back on the "let windows automatically configure network" is unchecked and i have to go through the process of checking it again. I uninstalled the wireless adapter and reinstalled the drivers only and then ran the windows wireless setup wizard but the problem persists. Any help on this would be much appreciated.!!!! Thanks!!

First of all, give your network a unique SSID. Do not use "linksys". If you are using "linksys" you may be trying to connect to your neighbor's router. Also set "SSID Broadcast" to "enabled". This will help your computer find and lock on to your router's signal.
Do not let "Windows automatically configure your network". Instead do the following:
Also, in the computer, go to your wireless software, and go to "Preferred Networks" (sometimes called "Profiles" ). There are probably a few networks listed. Delete any network named "linksys". Also delete any network that you do not recognize, or that you no longer use. Delete your current network (this will remove any old settings). Reboot computer. Return to "Preferred Networks" and re-enter your current network info (SSID, encryption (if any), and key (if any) ). Then select your current network and make it your default network, and set it to automatic login. You may need to go to "settings" to do this, or you may need to right click on your network and select "Properties" or "settings". Reboot computer. It should connect automatically. If you still have trouble, in the computer, temporarily disable your software firewall, including Windows Firewall, and see if that helps.
Some users have reported improved wireless connections by switching to WPA ( = WPA with TKIP) encryption.

Automatic connection "ping" / health check in TopLink JPA ?

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