291116 [pool-1-thread-6] WARN de.fernunihagen.dna.jkn.scalephant.network.server.ClientConnectionHandler - Error while delete distribution group
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:922)
at java.util.HashMap$KeyIterator.next(HashMap.java:956)
at de.fernunihagen.dna.jkn.scalephant.storage.StorageInterface.deleteAllTablesInDistributionGroup(StorageInterface.java:110)
at de.fernunihagen.dna.jkn.scalephant.network.server.ClientConnectionHandler.handleDeleteDistributionGroup(ClientConnectionHandler.java:308)
at de.fernunihagen.dna.jkn.scalephant.network.server.ClientConnectionHandler.handleNextPackage(ClientConnectionHandler.java:681)
at de.fernunihagen.dna.jkn.scalephant.network.server.ClientConnectionHandler.run(ClientConnectionHandler.java:169)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)