Running out of file descriptors on recovery can give NullPointerException. Should give clearer message
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                 Key: DERBY-3976
                 URL: https://issues.apache.org/jira/browse/DERBY-3976
             Project: Derby
          Issue Type: Bug
          Components: Store
    Affects Versions: 10.4.2.0, 10.3.3.0, 10.2.2.0, 10.1.3.1, 10.5.0.0
            Reporter: Kathey Marsden
            Priority: Minor


Running out of file descriptors on recovery can cause a NullPointerException. It should give a clearer message.  To reproduce
1) Run attached program with create argument
   java ReproNPEOnLowFD create
2) Set ulimit low
    ulimit -n 100
3) Run the program again with no argements
   java ReproNPEOnLowFD



# java ReproNPEOnLowFD create
Creating database
# ulimit -n 100
# java ReproNPEOnLowFD
java.lang.NullPointerException
        at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openContainer(BaseDataFileFactory.java:558)
        at org.apache.derby.impl.store.raw.data.BaseDataFileFactory.openDroppedContainer(BaseDataFileFactory.java:514)
        at org.apache.derby.impl.store.raw.xact.Xact.openDroppedContainer(Xact.java:1298)
        at org.apache.derby.impl.store.raw.data.ContainerBasicOperation.findContainer(ContainerBasicOperation.java:144)
        at org.apache.derby.impl.store.raw.data.ContainerBasicOperation.needsRedo(ContainerBasicOperation.java:201)
        at org.apache.derby.impl.store.raw.log.FileLogger.redo(FileLogger.java:1394)
        at org.apache.derby.impl.store.raw.log.LogToFile.recover(LogToFile.java:802)
        at org.apache.derby.impl.store.raw.RawStore.boot(RawStore.java:327)
        at org.apache.derby.impl.services.monitor.BaseMonitor.boot(BaseMonitor.java:1999)
        at org.apache.derby.impl.services.monitor.TopService.bootModule(TopService.java:290)
        at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(BaseMonitor.java:539)
        at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Monitor.java:418)
        at org.apache.derby.impl.store.access.RAMAccessManager.boot(RAMAccessManager.java:994)
        at org.apache.derby.impl.services.monitor.BaseMonitor.boot(BaseMonitor.java:1999)
        at org.apache.derby.impl.services.monitor.TopService.bootModule(TopService.java:290)
        at org.apache.derby.impl.services.monitor.BaseMonitor.startModule(BaseMonitor.java:539)
        at org.apache.derby.iapi.services.monitor.Monitor.bootServiceModule(Monitor.java:418)
        at org.apache.derby.impl.db.BasicDatabase.bootStore(BasicDatabase.java:758)
        at org.apache.derby.impl.db.BasicDatabase.boot(BasicDatabase.java:179)
        at org.apache.derby.impl.services.monitor.BaseMonitor.boot(BaseMonitor.java:1999)
        at org.apache.derby.impl.services.monitor.TopService.bootModule(TopService.java:290)
        at org.apache.derby.impl.services.monitor.BaseMonitor.bootService(BaseMonitor.java:1846)
        at org.apache.derby.impl.services.monitor.BaseMonitor.startProviderService(BaseMonitor.java:1712)
        at org.apache.derby.impl.services.monitor.BaseMonitor.findProviderAndStartService(BaseMonitor.java:1591)
        at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(BaseMonitor.java:996)
        at org.apache.derby.impl.services.monitor.BaseMonitor.startPersistentService(BaseMonitor.java:988)
        at org.apache.derby.iapi.services.monitor.Monitor.startPersistentService(Monitor.java:533)
        at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(EmbedConnection.java:1555)
        at org.apache.derby.impl.jdbc.EmbedConnection.<init>(EmbedConnection.java:200)
        at org.apache.derby.jdbc.Driver30.getNewEmbedConnection(Driver30.java:73)
        at org.apache.derby.jdbc.InternalDriver.connect(InternalDriver.java:187)
        at java.sql.DriverManager.getConnection(DriverManager.java:562)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at ReproNPEOnLowFD.main(ReproNPEOnLowFD.java:11)
Exception in thread "main" SQL Exception: Failed to start database 'wombat', see the next exception for details.
        at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:80)
        at org.apache.derby.impl.jdbc.Util.newEmbedSQLException(Util.java:87)
        at org.apache.derby.impl.jdbc.Util.generateCsSQLException(Util.java:166)
        at org.apache.derby.impl.jdbc.EmbedConnection.newSQLException(EmbedConnection.java:1912)
        at org.apache.derby.impl.jdbc.EmbedConnection.bootDatabase(EmbedConnection.java:1572)
        at org.apache.derby.impl.jdbc.EmbedConnection.<init>(EmbedConnection.java:200)
        at org.apache.derby.jdbc.Driver30.getNewEmbedConnection(Driver30.java:73)
        at org.apache.derby.jdbc.InternalDriver.connect(InternalDriver.java:187)
        at java.sql.DriverManager.getConnection(DriverManager.java:562)
        at java.sql.DriverManager.getConnection(DriverManager.java:208)
        at ReproNPEOnLowFD.main(ReproNPEOnLowFD.java:11)

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