Tanmay I'm sure you already found the solution to this long ago, but I think all you needed to do was convert the bytes array into a bytes object like this:
mymessageobj = mymessageproto.MyMessage() myrdd = mysparkcontext.sequenceFile(filename1, 'org.apache.hadoop.io.Text', 'org.apache.hadoop.io.BytesWritable') firstvaluebytearray = myrdd.first()[1] print mymessageobj.ParseFromString(bytes(firstvaluebytearray)) I have just started doing something similar, and I'm looking for an efficient way to decompile the entire sequenceFile, the same as you have done for just the first record (using Python of course). My ultimate goal is to decompile the entire sequenceFile and turn that into a Dataframe. On Sunday, July 2, 2017 at 11:50:12 PM UTC-5, Tanmay Saha wrote: > > And I also converted them to hex strings, cause I noticed a lot of hex > symbols in the strings, like A0, F3, and stuff. > > Tell me what else should I be looking into? > > On Mon, Jul 3, 2017 at 10:18 AM, Tanmay Saha <poro...@gmail.com > <javascript:>> wrote: > >> So my byte strings are basically kafka generated protobuf strings stored >> in sequential files as ".gz" files. Now I am reading them and trying to >> create a spark rdd to run analytics on them. When I try to print the >> strings I have, they are basically bytes and not the "usual" strings. >> >> On Sat, Jul 1, 2017 at 3:24 AM, Jisi Liu <liu...@google.com <javascript:> >> > wrote: >> >>> ParseFromString only takes the binary string that SerializeToString() >>> generates. I don't know you get the input bytes, but you probably would >>> have to decode it first. >>> >>> On Fri, Jun 30, 2017 at 6:45 AM Tanmay Saha <poro...@gmail.com >>> <javascript:>> wrote: >>> >>>> This is what I have done. >>>> >>>> mymessageobj = mymessageproto.MyMessage() >>>> myrdd = mysparkcontext.sequenceFile(filename1, >>>> 'org.apache.hadoop.io.Text', 'org.apache.hadoop.io.BytesWritable') >>>> firstvaluebytearray = myrdd.first()[1] >>>> >>>> myhexstring = ''.join(hex(eachvalue) for eachvalue in >>>> firstvaluebytearray) >>>> print mymessageobj.ParseFromString(myhexstring) >>>> >>>> But I get the error '*Unexpected end-group tag.*' >>>> >>>> When I try to send a byte string instead of a hexstring, it throws an >>>> error stating '*Invalid wire tag.*' >>>> >>>> Any help would be appreciated. >>>> Thanks, >>>> Tanmay. >>>> >>>> On Wednesday, July 15, 2015 at 3:02:12 AM UTC+5:30, Krystian Sakowski >>>> wrote: >>>>> >>>>> Finally I have found buggy code. I had an error in this line in C++ >>>>> server: >>>>> >>>>> memcpy((void *)reply.data(), &response_string, response_string.length()); >>>>> >>>>> Instead of the buggy code above it should be: >>>>> >>>>> memcpy((void *)reply.data(), (void *)response_string.data(), >>>>> response_string.length()); >>>>> >>>>> I understood how to convert C++ string into ZMQ string because I've >>>>> found this function on the web: >>>>> >>>>> // Convert string to 0MQ string and send to socket static bool s_send >>>>> (zmq::socket_t & socket, const std::string & string) { >>>>> >>>>> zmq::message_t message(string.size()); >>>>> memcpy (message.data(), string.data(), string.size()); >>>>> >>>>> bool rc = socket.send (message); >>>>> return (rc);} >>>>> >>>>> Below is the link to *zhelpers.hpp* header file which contains the >>>>> function pasted above and many other useful function for C++ ZMQ based >>>>> application: >>>>> https://github.com/imatix/zguide/blob/master/examples/C%2B%2B/zhelpers.hpp >>>>> >>>>> On Tuesday, July 14, 2015 at 7:46:00 PM UTC+2, maqi...@gmail.com >>>>> wrote: >>>>>> >>>>>> The length is these same on each side. >>>>>> However binary it is something else on each side. >>>>>> >>>>>> First of all I noted in python client that first byte of received >>>>>> message sporadically changes, >>>>>> Secondly >>>>>> >>>>>> This is serialized protobuf message to string in C++ server >>>>>> application 0x08 0x02 0x10 0x01 0x18 0x00 >>>>>> This is received packet in ZMQ client written in python 0xe4 0x1f >>>>>> 0x02 0x00 0x90 0xf6 >>>>>> >>>>>> So it is totally different.. >>>>>> >>>>>> On Tuesday, July 14, 2015 at 1:21:19 AM UTC+2, Ilia Mirkin wrote: >>>>>>> >>>>>>> Is what you're sending the same thing as what you're receiving? Do >>>>>>> the >>>>>>> lengths match up? Pretty easy to buggily truncate at the first null >>>>>>> byte... >>>>>>> >>>>>>> On Mon, Jul 13, 2015 at 5:22 PM, <maqi...@gmail.com> wrote: >>>>>>> > I'm developing zmq/protobuf application and I have a problem with >>>>>>> > deserialization of messages sent from C++ to python. I easily >>>>>>> handle >>>>>>> > messages from python to C++ however in the other direction I have >>>>>>> a problem. >>>>>>> > >>>>>>> > Protobuf library in python client application complains that it >>>>>>> detected >>>>>>> > 'Unexpected end-group tag.' >>>>>>> > >>>>>>> > I presume there is a problem between C++ serizalization and python >>>>>>> > deserialization. I'm wondering if there is some problem with null >>>>>>> terminator >>>>>>> > in C/C++ :(. >>>>>>> > >>>>>>> > This is my C++ serialization code.. >>>>>>> > >>>>>>> > // Test Code. >>>>>>> > // Try to send some 'demo' response back >>>>>>> > RPiProtocol::Message response; >>>>>>> > std::string response_string; >>>>>>> > response.set_type(RPiProtocol::Message::RESPONSE); >>>>>>> > response.set_command(RPiProtocol::Message::GET_SYS_INFO); >>>>>>> > response.set_version(0); >>>>>>> > >>>>>>> > // Serialize ZMQ message to string. >>>>>>> > if (response.SerializeToString(&response_string)) >>>>>>> > { >>>>>>> > // Debug prints. >>>>>>> > printf("%#010x\n", response_string.c_str()); >>>>>>> > cout << "Response string length= " << response_string.length() >>>>>>> << endl; >>>>>>> > >>>>>>> > // Send response message back to the client. >>>>>>> > zmq::message_t reply(response_string.length()); >>>>>>> > memcpy((void *)reply.data(), &response_string, >>>>>>> > response_string.length()); >>>>>>> > socket.send(reply); >>>>>>> > } >>>>>>> > >>>>>>> > This is my python deserialization code.. >>>>>>> > >>>>>>> > # Get the reply. >>>>>>> > message = socket.recv() >>>>>>> > print len(message) >>>>>>> > print ':'.join(x.encode('hex') for x in str(message)) >>>>>>> > response = rpi_protocol_pb2.Message() >>>>>>> > >>>>>>> > # This line fails >>>>>>> > response.ParseFromString(message) >>>>>>> > >>>>>>> > I debugged that deserialization fails in this function >>>>>>> > \google\protobuf\internal\python_message.py >>>>>>> > >>>>>>> > def InternalParse(self, buffer, pos, end): >>>>>>> > self._Modified() >>>>>>> > field_dict = self._fields >>>>>>> > unknown_field_list = self._unknown_fields >>>>>>> > while pos != end: >>>>>>> > (tag_bytes, new_pos) = local_ReadTag(buffer, pos) >>>>>>> > field_decoder, field_desc = decoders_by_tag.get(tag_bytes, >>>>>>> (None, >>>>>>> > None)) >>>>>>> > if field_decoder is None: >>>>>>> > value_start_pos = new_pos >>>>>>> > new_pos = local_SkipField(buffer, new_pos, end, tag_bytes) >>>>>>> > if new_pos == -1: # HERE I HAVE -1 !!! >>>>>>> > return pos >>>>>>> > if not unknown_field_list: >>>>>>> > unknown_field_list = self._unknown_fields = [] >>>>>>> > unknown_field_list.append((tag_bytes, >>>>>>> > buffer[value_start_pos:new_pos])) >>>>>>> > pos = new_pos >>>>>>> > else: >>>>>>> > pos = field_decoder(buffer, new_pos, end, self, >>>>>>> field_dict) >>>>>>> > if field_desc: >>>>>>> > self._UpdateOneofState(field_desc) >>>>>>> > return pos >>>>>>> > cls._InternalParse = InternalParse >>>>>>> > >>>>>>> > C++ (ZMQ SERVER - REP): http://pastebin.com/ACaXk8Vz >>>>>>> > >>>>>>> > PYTHON (ZMQ CLIENT - REQ): http://pastebin.com/X9DR8ue9 >>>>>>> > >>>>>>> > Could you help me with enabling my application? >>>>>>> > >>>>>>> > -- >>>>>>> > You received this message because you are subscribed to the Google >>>>>>> Groups >>>>>>> > "Protocol Buffers" group. >>>>>>> > To unsubscribe from this group and stop receiving emails from it, >>>>>>> send an >>>>>>> > email to protobuf+u...@googlegroups.com. >>>>>>> > To post to this group, send email to prot...@googlegroups.com. >>>>>>> > Visit this group at http://groups.google.com/group/protobuf. >>>>>>> > For more options, visit https://groups.google.com/d/optout. >>>>>>> >>>>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Protocol Buffers" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to protobuf+u...@googlegroups.com <javascript:>. >>>> To post to this group, send email to prot...@googlegroups.com >>>> <javascript:>. >>>> Visit this group at https://groups.google.com/group/protobuf. >>>> For more options, visit https://groups.google.com/d/optout. >>>> >>> >> >> >> -- >> >> >> >> *With Due RegardsTanmay Saha,* >> >> > > > -- > > > > *With Due RegardsTanmay Saha,* > > -- You received this message because you are subscribed to the Google Groups "Protocol Buffers" group. To unsubscribe from this group and stop receiving emails from it, send an email to protobuf+unsubscr...@googlegroups.com. To post to this group, send email to protobuf@googlegroups.com. Visit this group at https://groups.google.com/group/protobuf. For more options, visit https://groups.google.com/d/optout.