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MikePelant
Participating Frequently
February 1, 2022
Question

Coldfusion 2021 Add-On Services PDFg (Windows)

  • February 1, 2022
  • 1 reply
  • 2936 views

Trying to install and connect to the PDFg Service.  Windows Server.  Installation of Add-On Services goes just fine and it starts up the Windows Service just fine.  In CF Admin, under the PDF Service page, I try to "Verify" the connection and it fails saying "Connection verification failed for PDF Service Manager.  Looking at the logs in the Coldfusion Add-On Services folder, the stderrout.log shows the service successfully starting up on port 8993.  However the next several lines show the error from when I try to verify the service.  I can't find any similar issues like this so turning to the community for help.

 

Note: neo-document.xml has the same port (8993) that the service is running on.

 

Any other ideas out there?  Log entries are below:

 

Logs Upon Service Startup:

2022-01-31 22:08:34.374:INFO:oejs.Server:main: jetty-9.4.31.v20200723; built: 2020-07-23T17:57:36.812Z; git: 450ba27947e13e66baa8cd1ce7e85a4461cacc1d; jvm 11.0.13+10-LTS-370
2022-01-31 22:08:34.405:INFO:oejdp.ScanningAppProvider:main: Deployment monitor [file:///C:/ColdFusionAdd-onServices/webapps/] at interval 1
2022-01-31 22:08:34.827:INFO:oejs.session:main: DefaultSessionIdManager workerName=node0
2022-01-31 22:08:34.827:INFO:oejs.session:main: No SessionScavenger set, using defaults
2022-01-31 22:08:34.827:INFO:oejs.session:main: node0 Scavenging every 600000ms
2022-01-31 22:08:34.874:INFO:oejsh.ContextHandler:main: Started o.e.j.w.WebAppContext@3e62d773{AdminServlet,/AdminServlet,file:///C:/ColdFusionAdd-onServices/work/jetty-0_0_0_0-8993-AdminServlet_war-_AdminServlet-any-/webapp/,AVAILABLE}{C:\ColdFusionAdd-onServices\webapps\AdminServlet.war}
2022-01-31 22:08:34.983:INFO:oejsh.ContextHandler:main: Started o.e.j.w.WebAppContext@22ffa91a{PDFgServlet,/PDFgServlet,file:///C:/ColdFusionAdd-onServices/webapps/PDFgServlet/,AVAILABLE}{C:\ColdFusionAdd-onServices\webapps\PDFgServlet}
2022-01-31 22:08:34.999:INFO:oejs.RequestLogWriter:main: Opened C:\ColdFusionAdd-onServices\logs\2022_02_01.request.log
2022-01-31 22:08:35.030:INFO:oejs.AbstractConnector:main: Started ServerConnector@68eedb9e{HTTP/1.1, (http/1.1)}{0.0.0.0:8993}
2022-01-31 22:08:35.045:INFO:oejs.Server:main: Started @2137ms

 

 

Logs Upon Verifying from CF Admin

2022-01-31 22:10:25.233:WARN:oejshC.PDFgServlet:qtp1794717576-24: unavailable
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1043)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:997)
at coldfusion.pdf.service.CFPDFGServicePool.createPDFgServicesPool(CFPDFGServicePool.java:91)
at coldfusion.pdf.service.CFPDFGServicePool.<init>(CFPDFGServicePool.java:53)
at coldfusion.pdf.service.CFPDFGServicePool.getServicePoolInstance(CFPDFGServicePool.java:59)
at coldfusion.pdf.service.CFPDFGServiceManager.initPDFServiceManager(CFPDFGServiceManager.java:77)
at coldfusion.pdf.service.remote.PDFGServlet.init(PDFGServlet.java:228)
at javax.servlet.GenericServlet.init(GenericServlet.java:244)
at org.eclipse.jetty.servlet.ServletHolder$WrapperServlet.init(ServletHolder.java:1289)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:602)
at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:473)
at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:728)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:564)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:501)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Thread.java:834)
2022-01-31 22:10:25.237:WARN:oejs.HttpChannel:qtp1794717576-24: /PDFgServlet/verify
javax.servlet.ServletException: javax.servlet.ServletException: PDFgServlet@9ac5bab0==coldfusion.pdf.service.remote.PDFGServlet,jsp=null,order=-1,inst=true,async=false
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:162)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:501)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by:
javax.servlet.ServletException: PDFgServlet@9ac5bab0==coldfusion.pdf.service.remote.PDFGServlet,jsp=null,order=-1,inst=true,async=false
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:620)
at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:473)
at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:728)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:564)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:501)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by:
java.util.ConcurrentModificationException
at java.base/java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1043)
at java.base/java.util.ArrayList$Itr.next(ArrayList.java:997)
at coldfusion.pdf.service.CFPDFGServicePool.createPDFgServicesPool(CFPDFGServicePool.java:91)
at coldfusion.pdf.service.CFPDFGServicePool.<init>(CFPDFGServicePool.java:53)
at coldfusion.pdf.service.CFPDFGServicePool.getServicePoolInstance(CFPDFGServicePool.java:59)
at coldfusion.pdf.service.CFPDFGServiceManager.initPDFServiceManager(CFPDFGServiceManager.java:77)
at coldfusion.pdf.service.remote.PDFGServlet.init(PDFGServlet.java:228)
at javax.servlet.GenericServlet.init(GenericServlet.java:244)
at org.eclipse.jetty.servlet.ServletHolder$WrapperServlet.init(ServletHolder.java:1289)
at org.eclipse.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:602)
at org.eclipse.jetty.servlet.ServletHolder.getServlet(ServletHolder.java:473)
at org.eclipse.jetty.servlet.ServletHolder.prepare(ServletHolder.java:728)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:564)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:602)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:235)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1610)
at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:233)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1377)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:188)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:507)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1580)
at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:186)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1292)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:234)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:146)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:127)
at org.eclipse.jetty.server.Server.handle(Server.java:501)
at org.eclipse.jetty.server.HttpChannel.lambda$handle$1(HttpChannel.java:383)
at org.eclipse.jetty.server.HttpChannel.dispatch(HttpChannel.java:556)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:375)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:273)
at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:311)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:105)
at org.eclipse.jetty.io.ChannelEndPoint$1.run(ChannelEndPoint.java:104)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:806)
at org.eclipse.jetty.util.thread.QueuedThreadPool$Runner.run(QueuedThreadPool.java:938)
at java.base/java.lang.Thread.run(Thread.java:834)

    1 reply

    BKBK
    Community Expert
    BKBKCommunity Expert
    Community Expert
    February 1, 2022

    Which logs are those?

     

    What happens when you launch the following test code as a CFM page?

     

    <cftry>
	<cfhttp url="http://127.0.0.1:8993/PDFgServlet/verify" method="get" result="httpResult"></cfhttp>
	<cfdump var="#httpResult#" label="Verify PDFg service using CFHTTP - Result">
<cfcatch type="any" >
	<cfdump var="#cfcatch#" label="Verify PDFg service using CFHTTP - Error">
</cfcatch>	
</cftry>

     

    If you continue to get java.util.ConcurrentModificationException with the above test, it will mean race conditions. That is, two or more threads are simultaneously trying to get access to the same servlet. That will in turn suggest that two instances of the PDFg service are running.

     

    Might the root cause be as follows: you first installed an instance of the PDFg service along with ColdFusion. You then followed that with a second, standalone, instance of the service.  

     

    BKBK
    Community Expert
    BKBKCommunity Expert
    Community Expert
    February 1, 2022

    I have a change of mind. The root cause of the problem is unlikely to be double PDFg services. I am ruling this out after a test.

     

    When I installed ColdFusion 2021, I enabled the installation of the accompanying PDFg service. On the PDF service page in the ColdFusion Administrator, the PDF service verified OK on port 8993.

     

    Following your comments, I decided to test my own hypothesis. So I downloaded and installed the standalone Add-on Services alongside ColdFusion 2021. 

     

    However, everything seems to work just fine. There are no errors - in fact, no log files - in C:\ColdFusionAdd-onServices\logs. Plus, in the ColdFusion Administrator, the PDF service again verifies OK on port 8993. That is why I am ruling out double PDFg services as the root cause. 

     

    But that test gave me another idea. What if you install the PDF service that is packaged in ColdFusion? For example, via the ColdFusion Administrator. You could, for test purposes, install all packages available in CF2021 to ensure that you include all possible dependencies.

     

    M
    MikePelantAuthor
    Participating Frequently
    February 2, 2022

    @BKBK , after all of your questions regarding whether it was installed during the intial installation, I did some more digging and I'm embarrassed to admit it DOES appear that it was installed originally.  Therefore, no need for the separate Add-On Services installation.  That would likely explain the ConcurrentModificationException.

    So, with that knowledge, I completely uninstalled the Add-On installation, rebooted the server, and went back into the Admin Console to verify the PDF Service.  Still getting the "Connection verification failed" message and the Server.log file indicating:

    "Error","http-nio-8500-exec-8","02/02/22","09:58:45","","Connect to 127.0.0.1:8987 [/127.0.0.1] failed: Connection refused: connect http://127.0.0.1:8987/PDFgServlet/verify"
    "Error","http-nio-8500-exec-8","02/02/22","09:58:45","","Connection verification failed. The root cause is : Connect to 127.0.0.1:8987 [/127.0.0.1] failed: Connection refused: connect"

     

    Also, there is nothing in the Server.log file when the CF Service is restarted, that indicates the PDFg Service is running on a specific port.  All I see that seems to be related to the PDFg service is "Package htmltopdf started...". 

     

    I've even tried to remove the htmltopdf package and re-add it (restarting CF inbetween).  I still can't get it to connect.

     

    So, I guess I'm back to the beginning here.

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