Dear tpoterba,
This is the whole error message including traceback.
---------------------------------------------------------------------------
Py4JJavaError Traceback (most recent call last)
<ipython-input-5-aca8dac9a9a8> in <module>
1 import hail as hl
----> 2 hl.init(default_reference='GRCh38')
</Users/dahaelee/anaconda3/lib/python3.7/site-packages/decorator.py:decorator-gen-1751> in init(sc, app_name, master, local, log, quiet, append, min_block_size, branching_factor, tmp_dir, default_reference, idempotent, global_seed, spark_conf, skip_logging_configuration, local_tmpdir, _optimizer_iterations)
~/anaconda3/lib/python3.7/site-packages/hail/typecheck/check.py in wrapper(__original_func, *args, **kwargs)
612 def wrapper(__original_func, *args, **kwargs):
613 args_, kwargs_ = check_all(__original_func, args, kwargs, checkers, is_method=is_method)
--> 614 return __original_func(*args_, **kwargs_)
615
616 return wrapper
~/anaconda3/lib/python3.7/site-packages/hail/context.py in init(sc, app_name, master, local, log, quiet, append, min_block_size, branching_factor, tmp_dir, default_reference, idempotent, global_seed, spark_conf, skip_logging_configuration, local_tmpdir, _optimizer_iterations)
229 idempotent, sc, spark_conf, app_name, master, local, log,
230 quiet, append, min_block_size, branching_factor, tmpdir, local_tmpdir,
--> 231 skip_logging_configuration, optimizer_iterations)
232
233 HailContext(
~/anaconda3/lib/python3.7/site-packages/hail/backend/spark_backend.py in __init__(self, idempotent, sc, spark_conf, app_name, master, local, log, quiet, append, min_block_size, branching_factor, tmpdir, local_tmpdir, skip_logging_configuration, optimizer_iterations)
191 else:
192 self._jbackend = hail_package.backend.spark.SparkBackend.apply(
--> 193 jsc, app_name, master, local, True, min_block_size, tmpdir, local_tmpdir)
194 self._jhc = hail_package.HailContext.apply(
195 self._jbackend, log, True, append, branching_factor, skip_logging_configuration, optimizer_iterations)
~/anaconda3/lib/python3.7/site-packages/py4j/java_gateway.py in __call__(self, *args)
1255 answer = self.gateway_client.send_command(command)
1256 return_value = get_return_value(
-> 1257 answer, self.gateway_client, self.target_id, self.name)
1258
1259 for temp_arg in temp_args:
~/anaconda3/lib/python3.7/site-packages/py4j/protocol.py in get_return_value(answer, gateway_client, target_id, name)
326 raise Py4JJavaError(
327 "An error occurred while calling {0}{1}{2}.\n".
--> 328 format(target_id, ".", name), value)
329 else:
330 raise Py4JError(
Py4JJavaError: An error occurred while calling z:is.hail.backend.spark.SparkBackend.apply.
: java.lang.IllegalArgumentException: requirement failed
at scala.Predef$.require(Predef.scala:212)
at is.hail.backend.spark.SparkBackend$.apply(SparkBackend.scala:191)
at is.hail.backend.spark.SparkBackend.apply(SparkBackend.scala)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:282)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:238)
at java.base/java.lang.Thread.run(Thread.java:830)
And this is my python version checked in terminal.
$ python --version
Python 3.7.6