java - Amazon S3 upload InputStream - thread hangs -


i writing basic method put/get files amazon s3 bucket. here relevant code method."key" isthe s3 name , "savestream" inputstream

upload myupload = transfermanager.upload(daqbucketname, key, savestream, metadata);  try {     myupload.waitforcompletion();     savestream.close();     } catch (interruptedexception e) {         key = null;         e.printstacktrace();     } catch (amazonserviceexception e) {         key = null;         e.printstacktrace(); } catch (amazonclientexception e) {     key = null;         e.printstacktrace(); } catch (ioexception e) {     e.printstacktrace(); }    {         if (savestream != null) {             try {             savestream.close();         } catch (ioexception e) {             e.printstacktrace();         }         } }   return key;  }

the stream uploads there thread stops program completing (leaving program running). ideas going wrong ?here jstack dump:

"attach listener" daemon prio=10 tid=0x6a403c00 nid=0x2019 runnable [0x00000000]    java.lang.thread.state: runnable  "destroyjavavm" prio=10 tid=0xb6609400 nid=0x1b51 waiting on condition [0x00000000]    java.lang.thread.state: runnable  "s3-transfer-manager-worker-1" prio=10 tid=0x695d1800 nid=0x1b5f waiting on condition [0x68efe000]    java.lang.thread.state: waiting (parking)     @ sun.misc.unsafe.park(native method)     - parking wait  <0x9f3a2178> (a java.util.concurrent.locks.abstractqueuedsynchronizer$conditionobject)     @ java.util.concurrent.locks.locksupport.park(locksupport.java:186)     @ java.util.concurrent.locks.abstractqueuedsynchronizer$conditionobject.await(abstractqueuedsynchronizer.java:2043)     @ java.util.concurrent.linkedblockingqueue.take(linkedblockingqueue.java:386)     @ java.util.concurrent.threadpoolexecutor.gettask(threadpoolexecutor.java:1043)     @ java.util.concurrent.threadpoolexecutor.runworker(threadpoolexecutor.java:1103)     @ java.util.concurrent.threadpoolexecutor$worker.run(threadpoolexecutor.java:603)     @ java.lang.thread.run(thread.java:679)  "java-sdk-http-connection-reaper" daemon prio=10 tid=0x69551800 nid=0x1b5e waiting on condition [0x69292000]    java.lang.thread.state: timed_waiting (sleeping)     @ java.lang.thread.sleep(native method)     @ com.amazonaws.http.idleconnectionreaper.run(idleconnectionreaper.java:75)  "low memory detector" daemon prio=10 tid=0xb66cb000 nid=0x1b5c runnable [0x00000000]    java.lang.thread.state: runnable  "c2 compilerthread1" daemon prio=10 tid=0xb66c9400 nid=0x1b5b waiting on condition [0x00000000]    java.lang.thread.state: runnable  "c2 compilerthread0" daemon prio=10 tid=0xb66c7400 nid=0x1b5a waiting on condition [0x00000000]    java.lang.thread.state: runnable  "signal dispatcher" daemon prio=10 tid=0xb66c6000 nid=0x1b59 runnable [0x00000000]    java.lang.thread.state: runnable  "finalizer" daemon prio=10 tid=0xb66b6400 nid=0x1b58 in object.wait() [0x6ae7d000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on <0x9f2a02c0> (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:133)     - locked <0x9f2a02c0> (a java.lang.ref.referencequeue$lock)     @ java.lang.ref.referencequeue.remove(referencequeue.java:149)     @ java.lang.ref.finalizer$finalizerthread.run(finalizer.java:177)  "reference handler" daemon prio=10 tid=0xb66b4c00 nid=0x1b57 in object.wait() [0x6a7eb000]    java.lang.thread.state: waiting (on object monitor)     @ java.lang.object.wait(native method)     - waiting on <0x9f2a4038> (a java.lang.ref.reference$lock)     @ java.lang.object.wait(object.java:502)     @ java.lang.ref.reference$referencehandler.run(reference.java:133)     - locked <0x9f2a4038> (a java.lang.ref.reference$lock)  "vm thread" prio=10 tid=0xb66b1000 nid=0x1b56 runnable   "gc task thread#0 (parallelgc)" prio=10 tid=0xb6610800 nid=0x1b52 runnable   "gc task thread#1 (parallelgc)" prio=10 tid=0xb6611c00 nid=0x1b53 runnable   "gc task thread#2 (parallelgc)" prio=10 tid=0xb6613400 nid=0x1b54 runnable   "gc task thread#3 (parallelgc)" prio=10 tid=0xb6614c00 nid=0x1b55 runnable   "vm periodic task thread" prio=10 tid=0xb66cd400 nid=0x1b5d waiting on condition   jni global references: 1641


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