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I posted this on the Midrange-L list and it was suggested I post it here.


I am hoping someone can point me in the right direction with this one.

Java is crashing when I use a method that should return a java list
object..

I checked the class using the javap -s command in qsh I get the details
about the class; (All class details from this are included below)

The method I am using is gstIds
public java.util.List getIds();
Signature: ()Ljava/util/List;

I have the prototype defined in my program as follows;

D getIds PR O ExtProc(*JAVA:
D 'com.braintreegateway.-
D ResourceCollection':'getIds')
D Class(*JAVA:'java.util.List')

D listIdJ S O Class(*JAVA:'java.util.List')

The following code snippet precedes the error but running in debug all
statements complete normally

// Create search request
transReqJ = transReqC();
dateParamsJ = dateParams(transReqJ);
transreqJ = setRange(dateParamsJ: startJ: endJ);
transGatewayJ = transGateway(gateway);

// Retrieve the transactions
result = search(transGatewayJ: transReqJ);

When the following line is executed it results in a gpf and system dump.
There is a stack trace showing on the screen but is meaningless to me -
See below.

listIdJ = getIds(result);

The joblog shows error MSG:RNX0301 Java exception received when calling
Java method.
Cause . . . . . : RPG procedure STTAPP100R in program XAPSW/STTAPP100R
received Java exception "**UNKNOWN ERROR**" when calling method "getIds"


with signature "()Ljava.util.List;" in class
"com.braintreegateway.ResourceCollection".


Results from javap -s

javap -s com.braintreegateway.ResourceCollection

The java.version property was detected as input. This property is used as
output only and has no effect on JVM initialization.
Compiled from "ResourceCollection.java"
public class com.braintreegateway.ResourceCollection extends
java.lang.Object implements java.lang.Iterable{
public com.braintreegateway.ResourceCollection(com.braintreegateway.Pager,

com.braintreegateway.util.NodeWrapper);
Signature:
(Lcom/braintreegateway/Pager;Lcom/braintreegateway/util/NodeWrapper;)V

public int getMaximumSize();
Signature: ()I
public java.util.Iterator iterator();
Signature: ()Ljava/util/Iterator;
public java.lang.Object getFirst();
Signature: ()Ljava/lang/Object;
public java.util.List getIds();
Signature: ()Ljava/util/List;
static java.util.List access$000(com.braintreegateway.ResourceCollection);


Signature: (Lcom/braintreegateway/ResourceCollection;)Ljava/util/List;


Stack Trace from screen when error occurs

----------- Stack Backtrace -----------
gpProtectedRunCallInMethod+0x24 (0xD07F3BC0 [libj9vm24.so+0x15bc0])
signalProtectAndRunGlue+0x14 (0xD080F090 [libj9vm24.so+0x31090])
j9sig_protect+0x138 (0xD0872F54 [libj9prt24.so+0x1f54])
gpProtectAndRun+0xc4 (0xD080F19C [libj9vm24.so+0x3119c])
gpCheckCallin+0x44 (0xD07F4398 [libj9vm24.so+0x16398])
callVirtualObjectMethodA+0x38 (0xD07F8538 [libj9vm24.so+0x1a538])
J9_i5OS_CallObjectMethodA+0xac (0xD054C8B0 [libi5osenv.so+0xd8b0])
(0x000036F0)



Don Brown


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