fix: passticket generation and limit eureka replication peers threads

common-service-core/src/main/java/org/zowe/apiml/passticket/PassTicketService.java

@@ -27,7 +27,7 @@
  */
 public class PassTicketService {
 
-    private IRRPassTicket irrPassTicket;
+    private final IRRPassTicket irrPassTicket;
 
     public PassTicketService() {
         this.irrPassTicket = ClassOrDefaultProxyUtils.createProxy(IRRPassTicket.class,
@@ -40,11 +40,13 @@ public PassTicketService() {
                 IRRPassTicketGenerationException.class, "getSafRc", "getRacfRc", "getRacfRsn"));
     }
 
-    public void evaluate(String userId, String applId, String passTicket) throws IRRPassTicketEvaluationException {
+    // IRRPassTicket is not thread-safe, must be synchronized
+    public synchronized void evaluate(String userId, String applId, String passTicket) throws IRRPassTicketEvaluationException {
         irrPassTicket.evaluate(userId.toUpperCase(), applId.toUpperCase(), passTicket.toUpperCase());
     }
 
-    public String generate(String userId, String applId) throws IRRPassTicketGenerationException {
+    // IRRPassTicket is not thread-safe, must be synchronized
+    public synchronized String generate(String userId, String applId) throws IRRPassTicketGenerationException {
         return irrPassTicket.generate(userId.toUpperCase(), applId.toUpperCase());
     }
 
@@ -118,8 +120,8 @@ public String generate(String userId, String applId) throws IRRPassTicketGenerat
         @Value
         private static class UserApp {
 
-            private final String userId;
-            private final String applId;
+            String userId;
+            String applId;
 
         }
     }

discovery-service/src/main/resources/application.yml

@@ -78,6 +78,7 @@ eureka:
         serviceUrl:
             defaultZone: ${apiml.discovery.allPeersUrls}
     server:
+        max-threads-for-peer-replication: 2
         useReadOnlyResponseCache: false
 
 management: