APAR status
Closed as program error.
Error description
Error Message: We get below exception, when we try to send more than number of max sge, work requests with 1 sge each. (ie) Assume number of sge allocated for QP is 4 and WR is 100 when we try to send 50 work requests with one sge each will result in below exception. max sge should not aggregate all WR's SGEs. It is per work request number.Exception in thread "main" java.io.IOException: QueuePair Limit exceeded for number of sgeat com.ibm.net.rdma.jverbs.verbs.NativePostReceiveMethod.<init>(Nat ivePostReceiveMethod.java:83)at com.ibm.net.rdma.jverbs.verbs.NativeRdmaJVerbs.preparePostReceiv e(NativeRdmaJVerbs.java:168)at com.ibm.net.rdma.jverbs.verbs.QueuePair.preparePostReceive(Queue Pair.java:208)at CustomEndpoint.init(CustomEndpoint.java:91)at com.ibm.net.rdma.jverbs.endpoints.RdmaEndpoint.allocateResources (RdmaEndpoint.java:193)at com.ibm.net.rdma.jverbs.endpoints.RdmaEndpointGroup.allocateReso urces(RdmaEndpointGroup.java:151)at com.ibm.net.rdma.jverbs.endpoints.RdmaEndpointGroup.allocateReso urcesRaw(RdmaEndpointGroup.java:196)at com.ibm.net.rdma.jverbs.endpoints.RdmaEndpoint.connect(RdmaEndpo int.java:131)at EndpointJverbsClient.start(EndpointJverbsClient.java:53)at EndpointJverbsClient.main(EndpointJverbsClient.java:74) . Stack Trace: N/A .
Local fix
NA
Problem summary
We are considering cumulative number of sge across work request and compare against the device max sge. But device max sge means max sges per work request. Now corrected the assumption. Fix is in both post send and post receive.
Problem conclusion
Fixed the assumption by doing the right check . This APAR will be fixed in the following Java Releases: 8 SR1 FP10 (8.0.1.10) 7 R1 SR3 FP10 (7.1.3.10) 7 SR9 FP 10 (7.0.9.10) . Contact your IBM Product's Service Team for these Service Refreshes and Fix Packs. For those running stand-alone, information about the available Service Refreshes and Fix Packs can be found at: https://www.ibm.com/developerworks/java/jdk/
Temporary fix
Comments
APAR Information
APAR number
IV72873
Reported component name
JAVA CLASS LIBS
Reported component ID
620700130
Reported release
800
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Special Attention
NoSpecatt
Submitted date
2015-04-29
Closed date
2015-06-26
Last modified date
2015-06-26
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
JAVA CLASS LIBS
Fixed component ID
620700130
Applicable component levels
R800 PSY
UP
R700 PSY
UP
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Document Information
Modified date:
21 February 2022