sijie opened a new issue #1287: NPE at DNS.reverse URL: https://github.com/apache/bookkeeper/issues/1287 **BUG REPORT** 1. Please describe the issue you observed: - What did you do? run the test - What did you expect to see? tests should pass - What did you see instead? It fails at starting the bookie as NPE is thrown at `DNS.reverseDns`. ``` java.lang.NullPointerException at org.apache.bookkeeper.net.DNS.reverseDns(DNS.java:90) at org.apache.bookkeeper.net.DNS.getHosts(DNS.java:225) at org.apache.bookkeeper.net.DNS.getDefaultHost(DNS.java:324) at org.apache.bookkeeper.net.DNS.getDefaultHost(DNS.java:340) at org.apache.bookkeeper.bookie.Bookie.getBookieAddress(Bookie.java:539) at org.apache.bookkeeper.bookie.ScanAndCompareGarbageCollector.<init>(ScanAndCompareGarbageCollector.java:96) at org.apache.bookkeeper.bookie.GarbageCollectorThread.<init>(GarbageCollectorThread.java:192) at org.apache.bookkeeper.bookie.InterleavedLedgerStorage.initialize(InterleavedLedgerStorage.java:107) at org.apache.bookkeeper.bookie.SortedLedgerStorage.initialize(SortedLedgerStorage.java:66) at org.apache.bookkeeper.bookie.Bookie.<init>(Bookie.java:721) at org.apache.bookkeeper.proto.BookieServer.newBookie(BookieServer.java:115) at org.apache.bookkeeper.proto.BookieServer.<init>(BookieServer.java:96) at org.apache.bookkeeper.test.BookKeeperClusterTestCase.startBookie(BookKeeperClusterTestCase.java:612) at org.apache.bookkeeper.test.BookKeeperClusterTestCase.startNewBookieAndReturnAddress(BookKeeperClusterTestCase.java:595) at org.apache.bookkeeper.test.BookKeeperClusterTestCase.startNewBookie(BookKeeperClusterTestCase.java:587) at org.apache.bookkeeper.test.BookKeeperClusterTestCase.startBKCluster(BookKeeperClusterTestCase.java:219) at org.apache.bookkeeper.test.BookKeeperClusterTestCase.setUp(BookKeeperClusterTestCase.java:134) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47) at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:298) at org.junit.internal.runners.statements.FailOnTimeout$CallableStatement.call(FailOnTimeout.java:292) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.lang.Thread.run(Thread.java:748) ```
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