z/VM: TCP/IP Messages and Codes - z/VM - IBM

DNS and Resolver Messagesattempt to obtain the data via TCP.This message will be displayed any time the situationoccurs if tracing is enabled. Otherwise, it will only bedisplayed when the answer portion of the packet hadto be truncated. Since that condition can lead tounresolved hosts, that error is considered ″Warning″level, and is displayed even when tracing is disabled.Depending on how the partial answer is handled, itstill may not result in any observable problem.System Action: The partial packet is used. The data itcontains is usually sufficient to continue processing.User or Operator Response:None.RoutineName: No room for headerSeverity:Warning.Explanation: The name server could have exceededbuffer capacity while building a packet, if the erroroccurred while attempting to send a packet. Also, thepacket received by the name server may have been toosmall to contain a name server packet header. Othermessages will indicate the direction of the packet.This message will be displayed any time the situationoccurs if tracing is enabled. Otherwise, it will only bedisplayed when the answer portion of the packet hadto be truncated. Since that condition can lead tounresolved hosts, that error is considered ″Warning″level, and is displayed even when tracing is disabled.Depending on how the partial answer is handled, itstill may not result in any observable problem.System Action:The packet is ignored.User or Operator Response: When the packets areinbound, they represent errors on the part of thesender. If these messages become excessive, turn onqueue tracing to determine the source of the badpackets and contact the name server administrator ofthat system.RoutineName: No room for label - input 'hostString'Severity:Warning.Explanation: A packet was being constructed, and thebuffer in which it is being constructed has run out ofspace. There are usually multiple packets put in abuffer in response to questions from foreign hosts. Thismessage, by itself, does not indicate any error.This message will be displayed any time the situationoccurs if tracing is enabled. Otherwise, it will only bedisplayed when the answer portion of the packet hadto be truncated. Since that condition can lead tounresolved hosts, that error is considered ″Warning″level, and is displayed even when tracing is disabled.Depending on how the partial answer is handled, itstill may not result in any observable problem.System Action:Datagram construction is halted. Thetruncated datagram is forwarded to the requesting host.User or Operator Response: If this message isoccurring often, ensure that QUEUE tracing is disabled.RoutineName: No room for type and classSeverity:Warning.Explanation: The name server exceeded buffercapacity. This can be caused by the receipt of atruncated packet. It can also occur when an outboundpacket is being constructed and not all the data will fit.In most cases, this does not indicate a problem. If thehost that asked the question did not get all theinformation it needed because it would not fit in asingle packet, it will ask additional questions orattempt to obtain the data via TCP.This message will be displayed any time the situationoccurs if tracing is enabled. Otherwise, it will only bedisplayed when the answer portion of the packet hadto be truncated. Since that condition can lead tounresolved hosts, that error is considered ″Warning″level, and is displayed even when tracing is disabled.Depending on how the partial answer is handled, itstill may not result in any observable problem.System Action: The host uses the partial packet. Thedata it contains is usually sufficient, and processingcontinues..User or Operator Response:None.RoutineName: No SOA or NS records foundSeverity:Warning.Explanation: The message indicates a probableconfiguration problem. If you have configured tooperate the name server as a secondary name server,and have never previously started it so that the SQLtables do not have any data for the domains you aresupporting, then this message does not represent anproblem. If you are acting as a primary name server,the SQL data should contain SOA and NS records foryou to operate properly.System Action:None.User or Operator Response: Verify that the zone datacontains the correct SOA and NS resource records.RoutineName: Notice arrives -->Severity:Informational.Explanation: We have just started processing a newpiece of work delivered via the PASCAL API. Themessage is only issued during diagnostic tracing.System Action:None.User or Operator Response:None.26 z/VM: TCP/IP Messages and Codes