IBM Support

PM76935: BBOO0323I MAXIMUM CONFIGURED NUMBER OF CONNECTIONS MESSAGE

Fixes are available

PM76935; 8.0.0.5: bboo0323i maximum configured number of connections message
PM76935; 8.0.0.1: bboo0323i maximum configured number of connections message
8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
PM76935; 8.5.0.1: bboo0323i maximum configured number of connections message

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APAR status

  • Closed as program error.

Error description

  • BBOO0323I MAXIMUM CONFIGURED NUMBER OF CONNECTIONS 20000 FOR
HOSTNAME/IP: *  PORT: nnnn REACHED NEW CONNECTIONS MAY NOT BE
ACCEPTED.

Message was reported on WebSphere Fixpack 8.0.0.3
The message appeared in the Control Region joblog.

This is due to java.lang.NullPointerException during destroy
method of XMemProxyCRInboundConnLink

Sample traceback:

java.lang.NullPointerException
   at
com.ibm.ws390.xmem.proxy.channel.XMemProxyCRInboundConnLink.dest
royCommon(XMemProxyCRInboundConnLink.java:301)
   at
com.ibm.ws390.xmem.proxy.channel.XMemProxyCRInboundConnLink.dest
roy(XMemProxyCRInboundConnLink.java:285)
   at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.destroy(Htt
pInboundLink.java:158)
   at
com.ibm.wsspi.channel.base.OutboundConnectorLink.destroy(Outboun
dConnectorLink.java:63)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPConnLink.destroyCommon(ZAioTC
PConnLink.java:1060)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPConnLink.destroy(ZAioTCPConnL
ink.java:1020)
   at
com.ibm.wsspi.channel.base.OutboundConnectorLink.close(OutboundC
onnectorLink.java:50)
   at
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.close(HttpI
nboundLink.java:781)
   at
com.ibm.wsspi.channel.base.InboundApplicationLink.close(InboundA
pplicationLink.java:58)
   at
com.ibm.ws390.xmem.proxy.channel.XMemProxyCRInboundReadCallback.
error(XMemProxyCRInboundReadCallback.java:47)
   at
com.ibm.ws.http.channel.inbound.impl.HttpISCBodyReadCallback.err
or(HttpISCBodyReadCallback.java:95)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPReadRequestContextImpl.readCo
mpleted(ZAioTCPReadRequestContextImpl.java:750)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPConnLink.readCompleted(ZAioTC
PConnLink.java:1206)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPChannel.readCompleted(ZAioTCP
Channel.java:929)
   at
com.ibm.ws.tcp.channel.impl.ZAioTCPChannelCPPUtilities.readCompl
eted(ZAioTCPChannelCPPUtilities.java:181)

Local fix

  • You may increase the number of connections:

To view this administrative console page, click Servers >
Server Types > WebSphere application servers > server_name >
Ports. Click on View associated transports for the port
associated with the TCP transport channel whose settings you
want to view.

Maximum open connections

Specifies the maximum number of connections that are available
for a server to use.

Leave the Maximum open connections property set to the default
value 20000, which is the maximum number of connections allowed.
The transport channel service by default manages high client
connection counts and requires no tuning.

Problem summary

  • ****************************************************************
* USERS AFFECTED:  All users of IBM WebSphere Application      *
*                  Server V8.0 and V8.5                        *
****************************************************************
* PROBLEM DESCRIPTION: WebSphere Application Server for z/OS   *
*                      fails to close inbound HTTP             *
*                      connections                             *
*                      that were used to send SOAP requests.   *
****************************************************************
* RECOMMENDATION:                                              *
****************************************************************
When an inbound HTTP connection is used to send a combination
of
raw HTTP requests and SOAP requests, the connection is
reconfigured in a way that causes a
java.lang.NullPointerException when the connection is closed.
This NullPointerException causes a portion of the close to be
bypassed, resulting in a leak of the native connection object
as
well as a failure to close the TCP/IP socket.  Depending on the
nature of the client, each individual occurrence of this
problem
may go unnoticed or the client may notice the connection
becoming unresponsive.  After a while the server may display
the
following message and stop accepting new connections:
BBOO0323I MAXIMUM CONFIGURED NUMBER OF CONNECTIONS 20000 FOR
HOSTNAME/IP: <HOST>  PORT: <PORT> REACHED NEW CONNECTIONS MAY
NOT BE ACCEPTED.
In addition, an FFDC record will show evidence of the following
NullPointerException:
java.lang.NullPointerException
at com.ibm.ws390.xmem.proxy.channel.XMemProxyCRInboundConnLink
.destroyCommon(XMemProxyCRInboundConnLink.java:301)
at com.ibm.ws390.xmem.proxy.channel.XMemProxyCRInboundConnLink
.destroy(XMemProxyCRInboundConnLink.java:285)
at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink
.destroy(HttpInboundLink.java:158)
at com.ibm.wsspi.channel.base.OutboundConnectorLink
.destroy(OutboundConnectorLink.java:63)
at com.ibm.ws.tcp.channel.impl.ZAioTCPConnLink
.destroyCommon(ZAioTCPConnLink.java:1060)

Problem conclusion

  • The NullPointerException was fixed and therefore HTTP
connections that handle both raw HTTP requests and SOAP requests
will now be properly and completely closed.

APAR PM76935 is currently targeted for inclusion in Fix Packs
8.0.0.6 and 8.5.0.2 of WebSphere Application Server.

Please refer to URL:
//www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
for Fix Pack availability.

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    PM76935
    • 

  • Reported component name
    WEBSPHERE FOR Z
    • 

  • Reported component ID
    5655I3500
    • 

  • Reported release
    800
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2012-11-12
    • 

  • Closed date
    2012-11-21
    • 

  • Last modified date
    2012-12-10
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Fix information


    

  • Fixed component name
    WEBSPHERE FOR Z
    • 

  • Fixed component ID
    5655I3500
    • 



Applicable component levels


    

  • R800  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS7K4U","label":"WebSphere Application Server for z\/OS"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"800","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            29 October 2021
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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