Message11598

Successive calls to socket.gethostname() or any other functions of this module makes the script execution crash with the following trace:

javax.script.ScriptException: java.lang.IllegalStateException: java.lang.IllegalStateException: failed to create a child event loop in <script> at line number 1
	at org.python.jsr223.PyScriptEngine.scriptException(PyScriptEngine.java:222)
	at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:59)
	at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:31)
	at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
	at testjython.Main.main(Main.java:49)
Caused by: Traceback (most recent call last):
  File "<script>", line 1, in <module>
  File "/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/socket.py", line 3, in <module>
  File "/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/_socket.py", line 217, in <module>
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
	at org.python.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
	at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.python.core.PyReflectedConstructor.constructProxy(PyReflectedConstructor.java:211)
java.lang.IllegalStateException: java.lang.IllegalStateException: failed to create a child event loop

	at org.python.core.Py.JavaError(Py.java:552)
	at org.python.core.Py.JavaError(Py.java:543)
	at org.python.core.PyReflectedConstructor.constructProxy(PyReflectedConstructor.java:221)
	at org.python.core.PyReflectedConstructor.__call__(PyReflectedConstructor.java:180)
	at org.python.core.PyObject.__call__(PyObject.java:438)
	at org.python.core.PyMethod.instancemethod___call__(PyMethod.java:237)
	at org.python.core.PyMethod.__call__(PyMethod.java:228)
	at org.python.core.PyMethod.__call__(PyMethod.java:223)
	at org.python.core.Deriveds.dispatch__init__(Deriveds.java:19)
	at org.python.core.PyObjectDerived.dispatch__init__(PyObjectDerived.java:1112)
	at org.python.core.PyType.type___call__(PyType.java:1822)
	at org.python.core.PyType.__call__(PyType.java:1805)
	at org.python.core.PyObject.__call__(PyObject.java:497)
	at org.python.core.PyObject.__call__(PyObject.java:501)
	at _socket$py.f$0(/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/_socket.py:1965)
	at _socket$py.call_function(/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/_socket.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.imp.createFromCode(imp.java:436)
	at org.python.core.util.importer.importer_load_module(importer.java:116)
	at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:170)
	at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer.__call__(Unknown Source)
	at org.python.core.PyBuiltinMethodNarrow.__call__(PyBuiltinMethodNarrow.java:46)
	at org.python.core.imp.loadFromLoader(imp.java:593)
	at org.python.core.imp.find_module(imp.java:547)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction.__call__(__builtin__.java:1280)
	at org.python.core.PyObject.__call__(PyObject.java:450)
	at org.python.core.__builtin__.__import__(__builtin__.java:1232)
	at org.python.core.imp.importFromAs(imp.java:1149)
	at org.python.core.imp.importFrom(imp.java:1124)
	at socket$py.f$0(/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/socket.py:132)
	at socket$py.call_function(/home/paraita/src/local_java_stuff/lib/jython-standalone-2.7.1.jar/Lib/socket.py)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.imp.createFromCode(imp.java:436)
	at org.python.core.util.importer.importer_load_module(importer.java:116)
	at org.python.modules.zipimport.zipimporter.zipimporter_load_module(zipimporter.java:170)
	at org.python.modules.zipimport.zipimporter$zipimporter_load_module_exposer.__call__(Unknown Source)
	at org.python.core.PyBuiltinMethodNarrow.__call__(PyBuiltinMethodNarrow.java:46)
	at org.python.core.imp.loadFromLoader(imp.java:593)
	at org.python.core.imp.find_module(imp.java:547)
	at org.python.core.imp.import_next(imp.java:838)
	at org.python.core.imp.import_module_level(imp.java:957)
	at org.python.core.imp.importName(imp.java:1057)
	at org.python.core.ImportFunction.__call__(__builtin__.java:1280)
	at org.python.core.PyObject.__call__(PyObject.java:450)
	at org.python.core.__builtin__.__import__(__builtin__.java:1232)
	at org.python.core.imp.importOne(imp.java:1076)
	at org.python.pycode._pyx270.f$0(<script>:3)
	at org.python.pycode._pyx270.call_function(<script>)
	at org.python.core.PyTableCode.call(PyTableCode.java:171)
	at org.python.core.PyCode.call(PyCode.java:18)
	at org.python.core.Py.runCode(Py.java:1614)
	at org.python.core.__builtin__.eval(__builtin__.java:497)
	at org.python.core.__builtin__.eval(__builtin__.java:501)
	at org.python.util.PythonInterpreter.eval(PythonInterpreter.java:259)
	at org.python.jsr223.PyScriptEngine.eval(PyScriptEngine.java:57)
	... 3 more
Caused by: java.lang.IllegalStateException: failed to create a child event loop
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:88)
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:58)
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:47)
	at org.python.netty.channel.MultithreadEventLoopGroup.<init>(MultithreadEventLoopGroup.java:59)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:77)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:72)
	at org.python.netty.channel.nio.NioEventLoopGroup.<init>(NioEventLoopGroup.java:59)
	at sun.reflect.GeneratedConstructorAccessor15.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.python.core.PyReflectedConstructor.constructProxy(PyReflectedConstructor.java:211)
	... 60 more
Caused by: org.python.netty.channel.ChannelException: failed to open a new selector
	at org.python.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:175)
	at org.python.netty.channel.nio.NioEventLoop.<init>(NioEventLoop.java:149)
	at org.python.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:127)
	at org.python.netty.channel.nio.NioEventLoopGroup.newChild(NioEventLoopGroup.java:36)
	at org.python.netty.util.concurrent.MultithreadEventExecutorGroup.<init>(MultithreadEventExecutorGroup.java:84)
	... 70 more
Caused by: java.io.IOException: Trop de fichiers ouverts
	at sun.nio.ch.IOUtil.makePipe(Native Method)
	at sun.nio.ch.EPollSelectorImpl.<init>(EPollSelectorImpl.java:65)
	at sun.nio.ch.EPollSelectorProvider.openSelector(EPollSelectorProvider.java:36)
	at org.python.netty.channel.nio.NioEventLoop.openSelector(NioEventLoop.java:173)
	... 74 more

This only happens with Jython 2.7.1, I could not reproduce with 2.7.0.
I also noticed that the execution is slightly slower on 2.7.1.
See the attached code to reproduce.