RFR: 8287062: com/sun/jndi/ldap/LdapPoolTimeoutTest.java failed due to different timeout message

[Jaikiran Pai]

Can I please get a review of this test-only change which proposes to address the intermittent failures in `com/sun/jndi/ldap/LdapPoolTimeoutTest.java`?

As noted in https://bugs.openjdk.org/browse/JDK-8287062, this test fails intermittently. This test was introduced in https://bugs.openjdk.org/browse/JDK-8277795 with the goal to verify that the LDAP connection timeout was honoured when concurrent connections were attempted. The test itself is simple and launches the LDAP connection attempts concurrently and expects each attempt to fail with an exception. In order to verify that the failure is for the right reasons, it tries its best to check the exception type and exception message. If they don't match the exception messages this test knows of, the exception is propagated to fail the test.

It so happens that different parts of LDAP connection management code and some other parts of java.net.Socket code might emit different exception messages and in some cases the java.net.Socket might emit the right exception type but without any exception message. Some of the recent sightings of this test failure have this stacktrace:


javax.naming.CommunicationException: example.com:1234 [Root exception is java.net.SocketTimeoutException]
	at java.naming/com.sun.jndi.ldap.Connection.<init>(Connection.java:251)
	at java.naming/com.sun.jndi.ldap.LdapClient.<init>(LdapClient.java:136)
	at java.naming/com.sun.jndi.ldap.LdapClientFactory.createPooledConnection(LdapClientFactory.java:71)
	at java.naming/com.sun.jndi.ldap.pool.Connections.createConnection(Connections.java:184)
	at java.naming/com.sun.jndi.ldap.pool.Connections.getAvailableConnection(Connections.java:150)
	at java.naming/com.sun.jndi.ldap.pool.Pool.getOrCreatePooledConnection(Pool.java:196)
	at java.naming/com.sun.jndi.ldap.pool.Pool.getPooledConnection(Pool.java:152)
	at java.naming/com.sun.jndi.ldap.LdapPoolManager.getLdapClient(LdapPoolManager.java:339)
	...
	at java.naming/javax.naming.directory.InitialDirContext.<init>(InitialDirContext.java:130)
	at LdapPoolTimeoutTest.lambda$attemptConnect$0(LdapPoolTimeoutTest.java:114)
	at LdapTimeoutTest.lambda$assertCompletion$0(LdapTimeoutTest.java:361)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:330)
	at java.base/java.lang.Thread.run(Thread.java:1516)
Caused by: java.net.SocketTimeoutException
	at java.base/java.net.SocksSocketImpl.remainingMillis(SocksSocketImpl.java:93)
	at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:284)
	at java.base/java.net.Socket.connect(Socket.java:668)
	at java.naming/com.sun.jndi.ldap.Connection.createConnectionSocket(Connection.java:341)
	at java.naming/com.sun.jndi.ldap.Connection.createSocket(Connection.java:283)
	at java.naming/com.sun.jndi.ldap.Connection.<init>(Connection.java:230)
	... 24 more

So it did fail for the right reason, but the test is unaware that one part of the java.net.Socket implementation throws the specified `java.net.SocketTimeoutException`, but without any exception message in that exception (https://github.com/openjdk/jdk/blob/master/src/java.base/share/classes/java/net/SocksSocketImpl.java#L93). This causes the test to fail.

The commit in this PR cleans up the exception handling code in the test to make it simpler. The updated code continues to expect a `NamingException` with a `cause` which is either a `SocketTimeoutException` type or has one of the known exception messages. This change continues to test the original expectations for which it was introduced in JDK-8277795.

tier2 testing with this change is in progress.

-------------

Commit messages:
 - missed an exception message in previous commit
 - 8287062: com/sun/jndi/ldap/LdapPoolTimeoutTest.java failed due to different timeout message

Changes: https://git.openjdk.org/jdk/pull/28725/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=28725&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287062
  Stats: 58 lines in 1 file changed: 25 ins; 13 del; 20 mod
  Patch: https://git.openjdk.org/jdk/pull/28725.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28725/head:pull/28725

PR: https://git.openjdk.org/jdk/pull/28725