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java.lang.NullPointerException on DB connection

2621199Jan 31 2017 — edited Feb 15 2017

I downloaded, installed and started to work with Early adopter 2 SQL Developer 4.2.0.16.365 Build 16.356.1154 (Win 64-bit jdk included) a few weeks ago after a new install of Windows 10 pro on my computer.  I did not export/import the connections I had from the previous SQL Developer 4.1.3 (Win 64-bit jdk included), also on Win 10 pro.

I copied msvcr100.dll from ...\sqldeveloper\jdk\jre\bin to newly created ...\sqldeveloper\jdk\bin, added DB TNS based connections and worked okay.  But the 14th DB that I added was not accessible.  Regardless of TNS or basic connection type (on the "New / Select Database Connection" window) that particular DB, though tested okay (Status : Success) could not connect.  (sqlplus client with tnsnames.ora or easyconnect host:port/service connects and runs properly.)

DB connections added afterwards work properly.

In the connection tree if we click that particular DB, let's call it DBnogo, we get a window titled "Error Connecting".  Clicking on the "Details" button we get the following details:

Exception Stack Trace:

java.lang.NullPointerException

  at oracle.dbtools.raptor.navigator.db.xml.NavigatorHook.getConnectionType(NavigatorHook.java:255)

  at oracle.dbtools.raptor.navigator.ObjectFactoryRegistry.createFactory(ObjectFactoryRegistry.java:164)

  at oracle.dbtools.raptor.navigator.ObjectFactoryRegistry.getFactory(ObjectFactoryRegistry.java:153)

  at oracle.dbtools.raptor.navigator.db.impl.DatabaseTreeNode.getObjectFactory(DatabaseTreeNode.java:86)

  at oracle.dbtools.raptor.navigator.db.impl.DatabaseTreeNode$LoadTask.doWork(DatabaseTreeNode.java:140)

  at oracle.dbtools.raptor.navigator.db.impl.DatabaseTreeNode$LoadTask.doWork(DatabaseTreeNode.java:114)

  at oracle.dbtools.raptor.backgroundTask.RaptorTask.call(RaptorTask.java:193)

  at java.util.concurrent.FutureTask.run(FutureTask.java:266)

  at oracle.dbtools.raptor.backgroundTask.RaptorTaskManager$RaptorFutureTask.run(RaptorTaskManager.java:629)

  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

  at java.util.concurrent.FutureTask.run(FutureTask.java:266)

  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

  at java.lang.Thread.run(Thread.java:745)

(BTW, though there is no valid connection, the electrical plug graphic shows on database DBnogo on the Connections tree.)

I took a DB connections export and imported into a fresh 4.1.5.21 installation and the same DBnogo database connected and ran properly.

Any ideas?

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Locked on Mar 15 2017
Added on Jan 31 2017
#sql-developer
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