[iran1314]

thxxxx a lot!!

[stepanov]

Ok, fix for https://issues.jboss.org/browse/AS7-2785 has solved the problem when one singleton refers to another via @EJB injection.

However, I seem to be facing the same issue when EJB bean obtains singleton reference not by injection but via an explicit JNDI lookup.

Attached is a stripped down example with the following structure:

ear:

   ejb1:

      @Startup @Singleton A1

      @Startup @Singleton B1

  ejb2:

      @Startup @Singleton A2

      @Startup @Singleton B2

Singletons A2 and B2 make JNDI lookups in their @PostConstruct methods, each one for both A1 and B1. After that they call testMethod() on both A1 an B1 (in different order). NOTE: I deliberately do not use @DependsOn annotation on either A2 or B2 since in my real application these are not singletons but SLSB and I observe the same results.

Now, when I deploy this ear to JBoss 7 (I use post-7.1.0.CR1 snapshot build #513), sometimes I get well expected result:

05:39:33,634 INFO  [org.test.B1] (MSC service thread 1-3) starting, instance id 2545222

05:39:33,637 INFO  [org.test.A1] (MSC service thread 1-1) starting, instance id 3928552

05:39:34,635 INFO  [org.test.B1] (MSC service thread 1-3) started, instance id 2545222

05:39:34,638 INFO  [org.test.A1] (MSC service thread 1-1) started, instance id 3928552

05:39:34,643 INFO  [org.test.B1] (MSC service thread 1-2) testMethod, instance id 2545222

05:39:34,645 INFO  [org.test.A1] (MSC service thread 1-2) testMethod, instance id 3928552

05:39:34,647 INFO  [org.test.A1] (MSC service thread 1-4) testMethod, instance id 3928552

05:39:34,648 INFO  [org.test.B1] (MSC service thread 1-4) testMethod, instance id 2545222

Here a single instance of A1 and B1 is created then testMethod is called twice on each instance (once by A2 and once by B2)

However, other times I get something like this:

05:44:11,901 INFO  [org.test.B1] (MSC service thread 1-1) starting, instance id 15920931

05:44:11,917 INFO  [org.test.A1] (MSC service thread 1-2) starting, instance id 473254

05:44:12,901 INFO  [org.test.B1] (MSC service thread 1-1) started, instance id 15920931

05:44:12,907 INFO  [org.test.B1] (MSC service thread 1-3) testMethod, instance id 15920931

05:44:12,917 INFO  [org.test.A1] (MSC service thread 1-2) started, instance id 473254

05:44:12,918 INFO  [org.test.A1] (MSC service thread 1-4) starting, instance id 6373940

05:44:13,919 INFO  [org.test.A1] (MSC service thread 1-4) started, instance id 6373940

05:44:13,920 INFO  [org.test.A1] (MSC service thread 1-4) testMethod, instance id 473254

05:44:13,921 INFO  [org.test.A1] (MSC service thread 1-3) testMethod, instance id 473254

05:44:13,921 INFO  [org.test.B1] (MSC service thread 1-4) testMethod, instance id 15920931

As you can see, here the second instance of A1 is created (but only the first one is used in calls).

Restarting JBoss several times I even got this:

05:41:55,358 INFO  [org.test.B1] (MSC service thread 1-4) starting, instance id 14035661

05:41:55,360 INFO  [org.test.A1] (MSC service thread 1-3) starting, instance id 32784682

05:41:56,359 INFO  [org.test.B1] (MSC service thread 1-4) started, instance id 14035661

05:41:56,361 INFO  [org.test.A1] (MSC service thread 1-3) started, instance id 32784682

05:41:56,360 INFO  [org.test.B1] (MSC service thread 1-2) starting, instance id 12922195

05:41:56,362 INFO  [org.test.A1] (MSC service thread 1-1) starting, instance id 25694010

05:41:57,362 INFO  [org.test.B1] (MSC service thread 1-2) started, instance id 12922195

05:41:57,364 INFO  [org.test.A1] (MSC service thread 1-1) started, instance id 25694010

05:41:57,368 INFO  [org.test.B1] (MSC service thread 1-2) testMethod, instance id 14035661

05:41:57,368 INFO  [org.test.A1] (MSC service thread 1-1) testMethod, instance id 32784682

05:41:57,369 INFO  [org.test.B1] (MSC service thread 1-1) testMethod, instance id 14035661

05:41:57,369 INFO  [org.test.A1] (MSC service thread 1-2) testMethod, instance id 32784682

Here both A1 and B1 PostConstruct methods are called twice (and yet again, only the first instances are used in calls).

Although the fact that only one instance is used in subsequent calls makes problem smaller, multiple calls of PostConstruct methods are still not acceptable for obvious reasons.

Any ideas?