I created a docken container from this bigdl image.
However wheb I tried to start nn_context:
sc = init_nncontext("...")
spark= SparkContext(sc)
I got this error: Exception: Java gateway process exited before sending its port number
/tmp/ipykernel_188/2945161649.py in <module>
----> 1 sc = init_nncontext("anomaly detection")
2 spark= SparkContext(sc)
/opt/work/bigdl-2.1.0/python/bigdl-spark_3.1.2-2.1.0-python-api.zip/bigdl/dllib/nncontext.py in init_nncontext(conf, cluster_mode, spark_log_level, redirect_spark_log, **kwargs)
534 spark_args.update(conf.getAll())
535 if cluster_mode == "spark-submit":
--> 536 sc = init_internal_nncontext(conf, spark_log_level, redirect_spark_log)
537 elif cluster_mode == "local":
538 if conf:
/opt/work/bigdl-2.1.0/python/bigdl-spark_3.1.2-2.1.0-python-api.zip/bigdl/dllib/nncontext.py in init_internal_nncontext(conf, spark_log_level, redirect_spark_log)
642
643 if isinstance(conf, six.string_types):
--> 644 sc = getOrCreateSparkContext(conf=None, appName=conf)
645 else:
646 sc = getOrCreateSparkContext(conf=conf)
/opt/work/bigdl-2.1.0/python/bigdl-spark_3.1.2-2.1.0-python-api.zip/bigdl/dllib/nncontext.py in getOrCreateSparkContext(conf, appName)
684 if appName:
685 spark_conf.setAppName(appName)
--> 686 return SparkContext.getOrCreate(spark_conf)
687 else:
688 return SparkContext.getOrCreate()
/opt/work/spark-3.1.2/python/lib/pyspark.zip/pyspark/context.py in getOrCreate(cls, conf)
382 with SparkContext._lock:
383 if SparkContext._active_spark_context is None:
--> 384 SparkContext(conf=conf or SparkConf())
385 return SparkContext._active_spark_context
386
/opt/work/spark-3.1.2/python/lib/pyspark.zip/pyspark/context.py in __init__(self, master, appName, sparkHome, pyFiles, environment, batchSize, serializer, conf, gateway, jsc, profiler_cls)
142 " is not allowed as it is a security risk.")
143
--> 144 SparkContext._ensure_initialized(self, gateway=gateway, conf=conf)
145 try:
146 self._do_init(master, appName, sparkHome, pyFiles, environment, batchSize, serializer,
/opt/work/spark-3.1.2/python/lib/pyspark.zip/pyspark/context.py in _ensure_initialized(cls, instance, gateway, conf)
329 with SparkContext._lock:
330 if not SparkContext._gateway:
--> 331 SparkContext._gateway = gateway or launch_gateway(conf)
332 SparkContext._jvm = SparkContext._gateway.jvm
333
/opt/work/spark-3.1.2/python/lib/pyspark.zip/pyspark/java_gateway.py in launch_gateway(conf, popen_kwargs)
106
107 if not os.path.isfile(conn_info_file):
--> 108 raise Exception("Java gateway process exited before sending its port number")
109
110 with open(conn_info_file, "rb") as info:
Exception: Java gateway process exited before sending its port number
