fix java build failure (#6062)

python/ray/_raylet.pyx

@@ -452,7 +452,7 @@ cdef deserialize_args(
                     c_args[i].get().GetMetadata()).to_pybytes()
                     == RAW_BUFFER_METADATA):
                 data = Buffer.make(c_args[i].get().GetData())
-                args.append(data)
+                args.append(data.to_pybytes())
             elif (c_args[i].get().HasMetadata() and Buffer.make(
                     c_args[i].get().GetMetadata()).to_pybytes()
                     == PICKLE_BUFFER_METADATA):

python/ray/scripts/scripts.py

@@ -470,7 +470,7 @@ def stop(force, verbose):
         debug_operator = "| tee /dev/stderr" if verbose else ""
 
         command = (
-            "kill -s {} $(ps ax -o {} | grep {} | grep -v grep {} | grep ray |"
+            "kill -s {} $(ps ax -o {} | grep {} | grep -v grep {} |"
             "awk '{{ print $1 }}') 2> /dev/null".format(
                 # ^^ This is how you escape braces in python format string.
                 "KILL" if force else "TERM",

python/ray/services.py

@@ -1184,6 +1184,7 @@ def start_raylet(redis_address,
         java_worker_command = build_java_worker_command(
             java_worker_options,
             redis_address,
+            node_manager_port,
             plasma_store_name,
             raylet_name,
             redis_password,
@@ -1251,6 +1252,7 @@ def start_raylet(redis_address,
 def build_java_worker_command(
         java_worker_options,
         redis_address,
+        node_manager_port,
         plasma_store_name,
         raylet_name,
         redis_password,
@@ -1275,6 +1277,7 @@ def build_java_worker_command(
 
     if redis_address is not None:
         command += "-Dray.redis.address={} ".format(redis_address)
+    command += "-Dray.raylet.node-manager-port={} ".format(node_manager_port)
 
     if plasma_store_name is not None:
         command += (

python/ray/signature.py

@@ -37,7 +37,9 @@ Attributes:
         by 'functools.partial'.
 """
 
-DUMMY_TYPE = "__RAY_DUMMY__"
+# This dummy type is also defined in ArgumentsBuilder.java. Please keep it
+# synced.
+DUMMY_TYPE = b"__RAY_DUMMY__"
 
 
 def get_signature(func):