java - System.out messed up after Jackson serialization -

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i've been trying serialize objects system.out (for debugging). call 

final jsonserializer serializer = new jsonserializer(); serializer.serialize( system.out, myobj ); system.out.println("done");

it prints out json, "done" never gets printed. debugging these lines, shows 3rd line gets executed, output never shows up.

is jackson bug, or doing wrong?

edit:

public class jsonserializer {  private objectmapper getconfiguredobjectmapper() {   final objectmapper mapper = new objectmapper();   mapper.enable( serializationconfig.feature.indent_output );   mapper.setvisibility( jsonmethod.field, visibility.any );   mapper.setvisibility( jsonmethod.getter, visibility.none );   mapper.configure( serializationconfig.feature.auto_detect_getters, false );   mapper.configure( serializationconfig.feature.auto_detect_is_getters, false );   mapper.configure( serializationconfig.feature.auto_detect_fields, false );      final simplemodule module = new simplemodule( "connectorserialization", new version( 0, 1, 0, null ) );   module.addserializer( new inputconnectorserializer() );   module.addserializer( new outputconnectorserializer() );   module.addserializer( new stateserializer() );   mapper.registermodule( module );    return mapper;   }   public void serialize( final outputstream outputstream, final object root ) {     final objectmapper mapper = getconfiguredobjectmapper();     try   {      mapper.writevalue( outputstream, root );    }   catch (final jsongenerationexception e)   {      // todo auto-generated catch block      e.printstacktrace();   }   catch (final jsonmappingexception e)   {      // todo auto-generated catch block      e.printstacktrace();   }   catch (final ioexception e)   {      // todo auto-generated catch block      e.printstacktrace();   }  } }

as answers other users got deleted, going answer own question. user stated issue jackson closes input stream automatically.

the solution add jsongenerator.feature.auto_close_target configuration, , set false:

mapper.configure(jsongenerator.feature.auto_close_target, false);

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