# ES 5.3 : Java client hangs on new PreBuiltTransportClient **URL:** \ **Category:** Elasticsearch\ **Created:** [April 11, 2017, 12:01am UTC](https://discuss.elastic.co/t/es-5-3-java-client-hangs-on-new-prebuilttransportclient/81892 "2017-04-11T00:01:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Barrett\_Strausser](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@Barrett\_Strausser](https://discuss.elastic.co/u/Barrett_Strausser)\ **Post date:** [April 11, 2017, 12:01am UTC](https://discuss.elastic.co/t/es-5-3-java-client-hangs-on-new-prebuilttransportclient/81892/1 "2017-04-11T00:01:33Z")
Client hangs on calling the constructor ``` public static void main(String[] args) throws IOException,Exception { Settings setting = Settings.builder() .put("cluster.name", "elasticsearch") .put("client.transport.sniff", false) .build(); PreBuiltTransportClient client = null; try { // Hangs here client = new PreBuiltTransportClient(setting); } catch (Exception e){ System.out.println("s"); } } ``` My gradle deps ``` compile ( 'org.elasticsearch:elasticsearch:5.3.0', 'org.elasticsearch.client:transport:5.3.0', 'org.apache.logging.log4j:log4j-api:2.8', 'org.apache.logging.log4j:log4j-core:2.8', ) ``` Jstack output ``` Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.66-b17 mixed mode): ``` "Attach Listener" #15 daemon prio=9 os\_prio=0 tid=0x00007fbb50001000 nid=0x2414 waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "elasticsearch[_client_][[timer]]" #14 daemon prio=5 os\_prio=0 tid=0x00007fbb9497b000 nid=0x23a5 waiting on condition [0x00007fbb7b3cd000] java.lang.Thread.State: TIMED\_WAITING (sleeping) at java.lang.Thread.sleep(Native Method) at org.elasticsearch.threadpool.ThreadPool$CachedTimeThread.run(ThreadPool.java:536) "Service Thread" #11 daemon prio=9 os\_prio=0 tid=0x00007fbb94469800 nid=0x239d runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C1 CompilerThread2" #10 daemon prio=9 os\_prio=0 tid=0x00007fbb94466000 nid=0x239c waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread1" #9 daemon prio=9 os\_prio=0 tid=0x00007fbb94462000 nid=0x239b waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "C2 CompilerThread0" #8 daemon prio=9 os\_prio=0 tid=0x00007fbb94460800 nid=0x239a waiting on condition [0x0000000000000000] java.lang.Thread.State: RUNNABLE "JDWP Command Reader" #7 daemon prio=10 os\_prio=0 tid=0x00007fbb44001000 nid=0x2396 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "JDWP Event Helper Thread" #6 daemon prio=10 os\_prio=0 tid=0x00007fbb94196800 nid=0x2395 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "JDWP Transport Listener: dt\_socket" #5 daemon prio=10 os\_prio=0 tid=0x00007fbb94193000 nid=0x2394 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Signal Dispatcher" #4 daemon prio=9 os\_prio=0 tid=0x00007fbb94184800 nid=0x2392 runnable [0x0000000000000000] java.lang.Thread.State: RUNNABLE "Finalizer" #3 daemon prio=8 os\_prio=0 tid=0x00007fbb9414d800 nid=0x2391 in Object.wait() [0x00007fbb80f17000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on \<0x000000075dd80db0\> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143) - locked \<0x000000075dd80db0\> (a java.lang.ref.ReferenceQueue$Lock) at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:164) at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209) "Reference Handler" #2 daemon prio=10 os\_prio=0 tid=0x00007fbb9414b800 nid=0x2390 in Object.wait() [0x00007fbb81018000] java.lang.Thread.State: WAITING (on object monitor) at java.lang.Object.wait(Native Method) - waiting on \<0x000000075dd80df0\> (a java.lang.ref.Reference$Lock) at java.lang.Object.wait(Object.java:502) at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:157) - locked \<0x000000075dd80df0\> (a java.lang.ref.Reference$Lock) "main" #1 prio=5 os\_prio=0 tid=0x00007fbb94011000 nid=0x238a runnable [0x00007fbb9b8fe000] java.lang.Thread.State: RUNNABLE at sun.nio.fs.UnixNativeDispatcher.stat0(Native Method) at sun.nio.fs.UnixNativeDispatcher.stat(UnixNativeDispatcher.java:286) at sun.nio.fs.UnixFileAttributes.get(UnixFileAttributes.java:70) at sun.nio.fs.UnixFileStore.devFor(UnixFileStore.java:55) at sun.nio.fs.UnixFileStore.(UnixFileStore.java:70) at sun.nio.fs.LinuxFileStore.(LinuxFileStore.java:48) at sun.nio.fs.LinuxFileSystem.getFileStore(LinuxFileSystem.java:112) at sun.nio.fs.UnixFileSystem$FileStoreIterator.readNext(UnixFileSystem.java:213) at sun.nio.fs.UnixFileSystem$FileStoreIterator.hasNext(UnixFileSystem.java:224) - locked \<0x0000000759da8b28\> (a sun.nio.fs.UnixFileSystem$FileStoreIterator) at org.apache.lucene.util.IOUtils.getFileStore(IOUtils.java:543) at org.apache.lucene.util.IOUtils.spinsLinux(IOUtils.java:487) at org.apache.lucene.util.IOUtils.spins(IOUtils.java:476) at org.elasticsearch.env.ESFileStore.(ESFileStore.java:60) at org.elasticsearch.env.Environment.(Environment.java:105) at org.elasticsearch.common.settings.ClusterSettings.(ClusterSettings.java:167) at org.elasticsearch.common.settings.SettingsModule.(SettingsModule.java:66) at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:140) at org.elasticsearch.client.transport.TransportClient.(TransportClient.java:268) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:125) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:111) at org.elasticsearch.transport.client.PreBuiltTransportClient.(PreBuiltTransportClient.java:101) at Entry.main(Entry.java:18) "VM Thread" os\_prio=0 tid=0x00007fbb94146000 nid=0x238f runnable "GC task thread#0 (ParallelGC)" os\_prio=0 tid=0x00007fbb94026800 nid=0x238b runnable "GC task thread#1 (ParallelGC)" os\_prio=0 tid=0x00007fbb94028000 nid=0x238c runnable "GC task thread#2 (ParallelGC)" os\_prio=0 tid=0x00007fbb9402a000 nid=0x238d runnable "GC task thread#3 (ParallelGC)" os\_prio=0 tid=0x00007fbb9402b800 nid=0x238e runnable "VM Periodic Task Thread" os\_prio=0 tid=0x00007fbb9446f000 nid=0x239e waiting on condition JNI global references: 7761 ---
**Author:** ![dadoonet](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/dadoonet/32/137187_2.png) [@dadoonet](https://discuss.elastic.co/u/dadoonet)\ **Post date:** [April 11, 2017, 2:10am UTC](https://discuss.elastic.co/t/es-5-3-java-client-hangs-on-new-prebuilttransportclient/81892/2 "2017-04-11T02:10:38Z")
Just to make sure. It hangs forever or for 30s then is failing ? Is elasticsearch running? ---
**Author:** ![Barrett\_Strausser](https://avatars.discourse-cdn.com/v4/letter/b/c89c15/32.png) [@Barrett\_Strausser](https://discuss.elastic.co/u/Barrett_Strausser)\ **Post date:** [April 11, 2017, 12:10pm UTC](https://discuss.elastic.co/t/es-5-3-java-client-hangs-on-new-prebuilttransportclient/81892/3 "2017-04-11T12:10:07Z")
It hangs "forever" which is to say I gave up on it after 5-10 mins. I discovered the issue. I saw a similar issue discussed on a github ticket but initially didn't pay much attention to since it seemed relevant to the server and not the TransportClient. The issue was I have a mount point whose filesystem (NFS) was not mounted. It appears the client attempts to enumerate mount points. Because the filesystem wasn't mounted the client was hanging indefinitely. A line or two of documentation could mention this. ---
**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\ **Post date:** [May 9, 2017, 12:19pm UTC](https://discuss.elastic.co/t/es-5-3-java-client-hangs-on-new-prebuilttransportclient/81892/4 "2017-05-09T12:19:39Z")
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