more info - new exception message:
Exception in thread "main"
org.apache.samza.system.SystemConsumersException: Cannot deserialize an
incoming message.
Updated the diff in pastebin with the changes.
On Mon, Mar 23, 2015 at 8:41 PM, Ash W Matheson <ash.mathe...@gmail.com>
wrote:
> Gah! Yeah, those were gone several revisions ago but didn't get nuked in
> the last iteration.
>
> OK, let me do a quick test to see if that was my problem all along.
>
> On Mon, Mar 23, 2015 at 8:38 PM, Navina Ramesh <
> nram...@linkedin.com.invalid> wrote:
>
>> Hey Ash,
>> I was referring to the lines before the try block.
>>
>> Map<String, Object> jsonObject = (Map<String, Object>)
>> envelope.getMessage();
>> WikipediaFeedEvent event = new WikipediaFeedEvent(jsonObject);
>>
>> try {
>> System.out.println("[DWH] should see this");
>> System.out.println(event.getRawEvent());
>> …
>>
>>
>> Did you remove those lines as well?
>>
>> Navina
>>
>> On 3/23/15, 8:31 PM, "Ash W Matheson" <ash.mathe...@gmail.com> wrote:
>>
>> >Just looking at the diff I posted and it's:
>> >
>> >
>> > 1. try {
>> > 2. - Map<String, Object> parsedJsonObject =
>> >parse(event.getRawEvent(
>> > ));
>> > 3. + System.out.println("[DWH] should see this");
>> > 4. + System.out.println(event.getRawEvent());
>> > 5. + // Map<String, Object> parsedJsonObject = parse(
>> > event.getRawEvent());
>> >
>> >
>> >I've removed the Map and added two System.out.println calls. So no,
>> there
>> >shouldn't be any reference to
>> >Map<String, Object> parsedJsonObject = parse(event.getRawEvent());
>> >in the source java file.
>> >
>> >
>> >On Mon, Mar 23, 2015 at 7:42 PM, Ash W Matheson <ash.mathe...@gmail.com>
>> >wrote:
>> >
>> >> I'm in transit right now but if memory serves me everything should be
>> >> commented out of that method except for the System.out.println call.
>> >>I'll
>> >> be home shortly and can confirm.
>> >> On Mar 23, 2015 7:28 PM, "Navina Ramesh" <nram...@linkedin.com.invalid
>> >
>> >> wrote:
>> >>
>> >>> Hi Ash,
>> >>> I just ran wikipedia-parser with your patch. Looks like you have set
>> >>>the
>> >>> message serde correctly in the configs. However, the original code
>> >>>still
>> >>> converts it into a Map for consumption in the WikipediaFeedEvent.
>> >>> I am seeing the following (expected):
>> >>>
>> >>> 2015-03-23 19:17:49 SamzaContainerExceptionHandler [ERROR] Uncaught
>> >>> exception in thread (name=main). Exiting process now.
>> >>> java.lang.ClassCastException: java.lang.String cannot be cast to
>> >>> java.util.Map
>> >>> at
>> >>>
>> >>>
>>
>> >>>samza.examples.wikipedia.task.WikipediaParserStreamTask.process(Wikipedi
>> >>>aPa
>> >>> rserStreamTask.java:38)
>> >>> at
>> >>>
>> >>>
>>
>> >>>org.apache.samza.container.TaskInstance$$anonfun$process$1.apply$mcV$sp(
>> >>>Tas
>> >>> kInstance.scala:133)
>> >>>
>> >>> Did you make the changes to fix this error? Your patch doesn¹t seem to
>> >>> have that.
>> >>> Line 38 Map<String, Object> jsonObject = (Map<String, Object>)
>> >>> envelope.getMessage();
>> >>>
>> >>>
>> >>>
>> >>> Lmk so I can investigate further.
>> >>>
>> >>> Cheers!
>> >>> Navina
>> >>>
>> >>> On 3/23/15, 6:43 PM, "Ash W Matheson" <ash.mathe...@gmail.com> wrote:
>> >>>
>> >>> >If anyone's interested, I've posted a diff of the project here:
>> >>> >http://pastebin.com/6ZW6Y1Vu
>> >>> >and the python publisher here: http://pastebin.com/2NvTFDFx
>> >>> >
>> >>> >if you want to take a stab at it.
>> >>> >
>> >>> >On Mon, Mar 23, 2015 at 6:04 PM, Ash W Matheson
>> >>><ash.mathe...@gmail.com>
>> >>> >wrote:
>> >>> >
>> >>> >> Ok, so very simple test, all running on a local machine, not across
>> >>> >> networks and all in the hello-samza repo this time around.
>> >>> >>
>> >>> >> I've got the datapusher.py file set up to push data into localhost.
>> >>>One
>> >>> >> event per second.
>> >>> >> And a modified hello-samza where I've modified the
>> >>> >> WikipediaParserStreamTask.java class to simply read what's there.
>> >>> >>
>> >>> >> Running them both now and I'm seeing in the stderr files
>> >>> >> (deploy/yarn/logs/userlogs/application_XXXXX/container_YYYY/stderr)
>> >>>the
>> >>> >> following:
>> >>> >>
>> >>> >> Exception in thread "main"
>> >>> >> org.apache.samza.system.SystemConsumersException: Cannot
>> >>>deserialize an
>> >>> >> incoming message.
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers.update(SystemConsumers.scala:2
>> >>>>>93)
>> >>> >> at org.apache.samza.system.SystemConsumers.org
>> >>> >>
>> >>>$apache$samza$system$SystemConsumers$$poll(SystemConsumers.scala:260)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers$$anonfun$refresh$2.apply(Syste
>> >>>>>mCo
>> >>> >>nsumers.scala:276)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers$$anonfun$refresh$2.apply(Syste
>> >>>>>mCo
>> >>> >>nsumers.scala:276)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.
>> >>>>>sca
>> >>> >>la:244)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.
>> >>>>>sca
>> >>> >>la:244)
>> >>> >> at scala.collection.Iterator$class.foreach(Iterator.scala:727)
>> >>> >> at
>> >>>scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
>> >>> >> at
>> >>> scala.collection.MapLike$DefaultKeySet.foreach(MapLike.scala:174)
>> >>> >> at
>> >>> >>
>> >>>scala.collection.TraversableLike$class.map(TraversableLike.scala:244)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>scala.collection.AbstractSet.scala$collection$SetLike$$super$map(Set.s
>> >>>>>cal
>> >>> >>a:47)
>> >>> >> at scala.collection.SetLike$class.map(SetLike.scala:93)
>> >>> >> at scala.collection.AbstractSet.map(Set.scala:47)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers.refresh(SystemConsumers.scala:
>> >>>>>276
>> >>> >>)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers.choose(SystemConsumers.scala:2
>> >>>>>13)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.container.RunLoop$$anonfun$process$2$$anonfun$2.apply
>> >>>>>(Ru
>> >>> >>nLoop.scala:81)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.container.RunLoop$$anonfun$process$2$$anonfun$2.apply
>> >>>>>(Ru
>> >>> >>nLoop.scala:81)
>> >>> >> at
>> >>> >>
>> >>>org.apache.samza.util.TimerUtils$class.updateTimer(TimerUtils.scala:37)
>> >>> >> at
>> >>>org.apache.samza.container.RunLoop.updateTimer(RunLoop.scala:36)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.container.RunLoop$$anonfun$process$2.apply(RunLoop.sc
>> >>>>>ala
>> >>> >>:80)
>> >>> >> at
>> >>> >>
>> >>>org.apache.samza.util.TimerUtils$class.updateTimer(TimerUtils.scala:37)
>> >>> >> at
>> >>>org.apache.samza.container.RunLoop.updateTimer(RunLoop.scala:36)
>> >>> >> at org.apache.samza.container.RunLoop.process(RunLoop.scala:79)
>> >>> >> at org.apache.samza.container.RunLoop.run(RunLoop.scala:65)
>> >>> >> at
>> >>> >>
>> >>>org.apache.samza.container.SamzaContainer.run(SamzaContainer.scala:556)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.container.SamzaContainer$.safeMain(SamzaContainer.sca
>> >>>>>la:
>> >>> >>108)
>> >>> >> at
>> >>> >>
>> >>>
>>
>> >>>org.apache.samza.container.SamzaContainer$.main(SamzaContainer.scala:87)
>> >>> >> at
>> >>> >>org.apache.samza.container.SamzaContainer.main(SamzaContainer.scala)
>> >>> >> Caused by: org.codehaus.jackson.JsonParseException: Unexpected
>> >>> character
>> >>> >> ('M' (code 77)): expected a valid value (number, String, array,
>> >>>object,
>> >>> >> 'true', 'false' or 'null')
>> >>> >> at [Source: [B@5454d285; line: 1, column: 2]
>> >>> >> at
>> >>> >>
>> >>>org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1291)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParse
>> >>>>>rMi
>> >>> >>nimalBase.java:385)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.impl.JsonParserMinimalBase._reportUnexpectedChar(
>> >>>>>Jso
>> >>> >>nParserMinimalBase.java:306)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.impl.Utf8StreamParser._handleUnexpectedValue(Utf8
>> >>>>>Str
>> >>> >>eamParser.java:1581)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8S
>> >>>>>tre
>> >>> >>amParser.java:436)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.
>> >>>>>jav
>> >>> >>a:322)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.jav
>> >>>>>a:2
>> >>> >>432)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.codehaus.jackson.map.ObjectMapper._readMapAndClose(ObjectMapper.ja
>> >>>>>va:
>> >>> >>2389)
>> >>> >> at
>> >>> >>
>> >>>org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1667)
>> >>> >> at
>> >>> >>org.apache.samza.serializers.JsonSerde.fromBytes(JsonSerde.scala:33)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.serializers.SerdeManager.fromBytes(SerdeManager.scala
>> >>>>>:11
>> >>> >>5)
>> >>> >> at
>> >>> >>
>> >>>
>> >>>
>>
>> >>>>>org.apache.samza.system.SystemConsumers.update(SystemConsumers.scala:2
>> >>>>>90)
>> >>> >>
>> >>> >>
>> >>> >> I changed the systems.kafka.samza.msg.serde=json to 'string' a
>> while
>> >>> >>back,
>> >>> >> but that caused a separate exception. However that was many, MANY
>> >>> >>attempts
>> >>> >> ago.
>> >>> >>
>> >>> >> On Mon, Mar 23, 2015 at 5:23 PM, Ash W Matheson <
>> >>> ash.mathe...@gmail.com>
>> >>> >> wrote:
>> >>> >>
>> >>> >>> Ahh, I was going to add it to the run-class.sh script.
>> >>> >>>
>> >>> >>> Yeah, it's already there by default:
>> >>> >>>
>> >>> >>>
>> >>> >>> # Metrics
>> >>> >>> metrics.reporters=snapshot,jmx
>> >>> >>>
>> >>> >>>
>> >>>
>> >>>
>>
>> >>>>>>metrics.reporter.snapshot.class=org.apache.samza.metrics.reporter.Met
>> >>>>>>ric
>> >>> >>>sSnapshotReporterFactory
>> >>> >>> metrics.reporter.snapshot.stream=kafka.metrics
>> >>> >>>
>> >>> >>>
>> >>>
>> >>>
>>
>> >>>>>>metrics.reporter.jmx.class=org.apache.samza.metrics.reporter.JmxRepor
>> >>>>>>ter
>> >>> >>>Factory
>> >>> >>>
>> >>> >>> So, where would I see those metrics?
>> >>> >>>
>> >>> >>> On Mon, Mar 23, 2015 at 5:15 PM, Ash W Matheson
>> >>> >>><ash.mathe...@gmail.com>
>> >>> >>> wrote:
>> >>> >>>
>> >>> >>>> read: I'm a C++ programmer looking at Java for the first time in
>> >>>> 10
>> >>> >>>> years
>> >>> >>>>
>> >>> >>>> On Mon, Mar 23, 2015 at 5:13 PM, Ash W Matheson
>> >>> >>>><ash.mathe...@gmail.com>
>> >>> >>>> wrote:
>> >>> >>>>
>> >>> >>>>> I'm assuming I have Jmx defined ... where would that get set?
>> >>> >>>>>
>> >>> >>>>> On Mon, Mar 23, 2015 at 5:08 PM, Chinmay Soman <
>> >>> >>>>> chinmay.cere...@gmail.com> wrote:
>> >>> >>>>>
>> >>> >>>>>> Hey Ash,
>> >>> >>>>>>
>> >>> >>>>>> Can you see your job metrics (if you have the Jmx metrics
>> >>>defined)
>> >>> >>>>>>to
>> >>> >>>>>> see
>> >>> >>>>>> if your job is actually doing anything ? My only guess at this
>> >>> point
>> >>> >>>>>> is the
>> >>> >>>>>> process method is not being called because somehow there's no
>> >>> >>>>>>incoming
>> >>> >>>>>> data. I could be totally wrong of course.
>> >>> >>>>>>
>> >>> >>>>>> On Mon, Mar 23, 2015 at 4:28 PM, Ash W Matheson <
>> >>> >>>>>> ash.mathe...@gmail.com>
>> >>> >>>>>> wrote:
>> >>> >>>>>>
>> >>> >>>>>> > Just to be clear, here's what's changed from the default
>> >>> >>>>>>hello-samza
>> >>> >>>>>> repo:
>> >>> >>>>>> >
>> >>> >>>>>> > wikipedia-parser.properties==========================
>> >>> >>>>>> > task.inputs=kafka.myTopic
>> >>> >>>>>> > systems.kafka.consumer.zookeeper.connect=
>> >>> >>>>>> > ec2-xxx-xxx-xxx-xxx.compute-1.amazonaws.com:2181/
>> >>> >>>>>> > systems.kafka.consumer.auto.offset.reset=smallest
>> >>> >>>>>> >
>> >>> >>>>>> > WikipediaParserStreamTask.java =====================
>> >>> >>>>>> > public void process(IncomingMessageEnvelope envelope,
>> >>> >>>>>> MessageCollector
>> >>> >>>>>> > collector, TaskCoordinator coordinator) {
>> >>> >>>>>> > Map<String, Object> jsonObject = (Map<String, Object>)
>> >>> >>>>>> > envelope.getMessage();
>> >>> >>>>>> > WikipediaFeedEvent event = new
>> >>> WikipediaFeedEvent(jsonObject);
>> >>> >>>>>> >
>> >>> >>>>>> > try {
>> >>> >>>>>> > System.out.println(event.getRawEvent());
>> >>> >>>>>> > // Map<String, Object> parsedJsonObject =
>> >>> >>>>>> parse(event.getRawEvent());
>> >>> >>>>>> >
>> >>> >>>>>> > // parsedJsonObject.put("channel", event.getChannel());
>> >>> >>>>>> > // parsedJsonObject.put("source", event.getSource());
>> >>> >>>>>> > // parsedJsonObject.put("time", event.getTime());
>> >>> >>>>>> >
>> >>> >>>>>> > // collector.send(new OutgoingMessageEnvelope(new
>> >>> >>>>>> > SystemStream("kafka", "wikipedia-edits"), parsedJsonObject));
>> >>> >>>>>> >
>> >>> >>>>>> > as well as the aforementioned changes to the log4j.xml file.
>> >>> >>>>>> >
>> >>> >>>>>> > The data pushed into the 'myTopic' topic is nothing more than
>> >>>a
>> >>> >>>>>> sentence.
>> >>> >>>>>> >
>> >>> >>>>>> >
>> >>> >>>>>> > On Mon, Mar 23, 2015 at 4:16 PM, Ash W Matheson <
>> >>> >>>>>> ash.mathe...@gmail.com>
>> >>> >>>>>> > wrote:
>> >>> >>>>>> >
>> >>> >>>>>> > > yep, modified log4j.xml to look like this:
>> >>> >>>>>> > >
>> >>> >>>>>> > > <root>
>> >>> >>>>>> > > <priority value="debug" />
>> >>> >>>>>> > > <appender-ref ref="RollingAppender"/>
>> >>> >>>>>> > > <appender-ref ref="jmx" />
>> >>> >>>>>> > > </root>
>> >>> >>>>>> > >
>> >>> >>>>>> > > Not sure what you mean by #2.
>> >>> >>>>>> > >
>> >>> >>>>>> > > However, I'm running now, not seeing any exceptions, but
>> >>>still
>> >>> >>>>>>not
>> >>> >>>>>> seeing
>> >>> >>>>>> > > any output from System.out.println(...)
>> >>> >>>>>> > >
>> >>> >>>>>> > > On Mon, Mar 23, 2015 at 11:29 AM, Naveen Somasundaram <
>> >>> >>>>>> > > nsomasunda...@linkedin.com.invalid> wrote:
>> >>> >>>>>> > >
>> >>> >>>>>> > >> Hey Ash,
>> >>> >>>>>> > >> 1. Did you happen to modify your log4j.xml
>> ?
>> >>> >>>>>> > >> 2. Can you print the class path that was
>> >>> printed
>> >>> >>>>>> when the
>> >>> >>>>>> > >> job started ? I am wondering if log4j was not loaded or
>> not
>> >>> >>>>>> present in
>> >>> >>>>>> > the
>> >>> >>>>>> > >> path where it¹s looking for. If you have been using hello
>> >>> >>>>>>samza,
>> >>> >>>>>> it
>> >>> >>>>>> > should
>> >>> >>>>>> > >> have pulled it from Maven.
>> >>> >>>>>> > >>
>> >>> >>>>>> > >> Thanks,
>> >>> >>>>>> > >> Naveen
>> >>> >>>>>> > >>
>> >>> >>>>>> > >> On Mar 22, 2015, at 10:35 AM, Ash W Matheson <
>> >>> >>>>>> ash.mathe...@gmail.com>
>> >>> >>>>>> > >> wrote:
>> >>> >>>>>> > >>
>> >>> >>>>>> > >> > Hey all,
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > Evaluating Samza currently and am running into some odd
>> >>> >>>>>>issues.
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > I'm currently working off the 'hello-samza' repo and
>> >>>trying
>> >>> >>>>>>to
>> >>> >>>>>> parse a
>> >>> >>>>>> > >> > simple kafka topic that I've produced through an extenal
>> >>> java
>> >>> >>>>>> app
>> >>> >>>>>> > >> (nothing
>> >>> >>>>>> > >> > other than a series of sentences) and it's failing
>> pretty
>> >>> >>>>>>hard
>> >>> >>>>>> for me.
>> >>> >>>>>> > >> The
>> >>> >>>>>> > >> > base 'hello-samza' set of apps works fine, but as soon
>> >>>as I
>> >>> >>>>>> change the
>> >>> >>>>>> > >> > configuration to look at a different Kafka/zookeeper I
>> >>>get
>> >>> >>>>>>the
>> >>> >>>>>> > >> following in
>> >>> >>>>>> > >> > the userlogs:
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > 2015-03-22 17:07:09 KafkaSystemAdmin [WARN] Unable to
>> >>>fetch
>> >>> >>>>>>last
>> >>> >>>>>> > offsets
>> >>> >>>>>> > >> > for streams [myTopic] due to
>> kafka.common.KafkaException:
>> >>> >>>>>> fetching
>> >>> >>>>>> > topic
>> >>> >>>>>> > >> > metadata for topics [Set(myTopic)] from broker
>> >>> >>>>>> > >> > [ArrayBuffer(id:0,host:redacted,port:9092)] failed.
>> >>> Retrying.
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > The modifications are pretty straightforward. In the
>> >>> >>>>>> > >> > Wikipedia-parser.properties, I've changed the following:
>> >>> >>>>>> > >> > task.inputs=kafka.myTopic
>> >>> >>>>>> > >> > systems.kafka.consumer.zookeeper.connect=redacted:2181/
>> >>> >>>>>> > >> > systems.kafka.consumer.auto.offset.reset=smallest
>> >>> >>>>>> > >> >
>> systems.kafka.producer.metadata.broker.list=redacted:9092
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > and in the actual java file
>> >>>WikipediaParserStreamTask.java
>> >>> >>>>>> > >> > public void process(IncomingMessageEnvelope envelope,
>> >>> >>>>>> > MessageCollector
>> >>> >>>>>> > >> > collector, TaskCoordinator coordinator) {
>> >>> >>>>>> > >> > Map<String, Object> jsonObject = (Map<String,
>> Object>)
>> >>> >>>>>> > >> > envelope.getMessage();
>> >>> >>>>>> > >> > WikipediaFeedEvent event = new
>> >>> >>>>>> WikipediaFeedEvent(jsonObject);
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > try {
>> >>> >>>>>> > >> > System.out.println(event.getRawEvent());
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > And then following the compile/extract/run process
>> >>>outlined
>> >>> >>>>>>in
>> >>> >>>>>> the
>> >>> >>>>>> > >> > hello-samza website.
>> >>> >>>>>> > >> >
>> >>> >>>>>> > >> > Any thoughts? I've looked online for any 'super simple'
>> >>> >>>>>> examples of
>> >>> >>>>>> > >> > ingesting kafka in samza with very little success.
>> >>> >>>>>> > >>
>> >>> >>>>>> > >>
>> >>> >>>>>> > >
>> >>> >>>>>> >
>> >>> >>>>>>
>> >>> >>>>>>
>> >>> >>>>>>
>> >>> >>>>>> --
>> >>> >>>>>> Thanks and regards
>> >>> >>>>>>
>> >>> >>>>>> Chinmay Soman
>> >>> >>>>>>
>> >>> >>>>>
>> >>> >>>>>
>> >>> >>>>
>> >>> >>>
>> >>> >>
>> >>>
>> >>>
>>
>>
>
