Hmm, that is very odd. It only checks the user if security is enabled to warn the user about potentially accessing something unsafe. I am not sure why that would cause an issue.
--Bobby Evans On 7/9/12 6:07 AM, "Prajakta Kalmegh" <pkalm...@gmail.com> wrote: >Hi Robert > >I figured out the problem just now. To avoid the below error, I had to set >the 'hadoop.http.staticuser.user' property in core-site.xml (defaults to >dr.who). I can now get runtime data from AppMaster using *curl* as well as >in GUI. > >I wonder if we have to set this property even when we are not specifying >the yarn web-proxy address (when it runs as part of RM by default) as >well. >If yes, was it documented somewhere which I failed to see? :( > >Anyways, thanks for your response so far. > >Regards, >Prajakta > > > >On Mon, Jul 9, 2012 at 3:29 PM, Prajakta Kalmegh <pkalm...@gmail.com> >wrote: > >> Hi Robert >> >> I started the proxyserver explicitly by specifying a value for the >> yarn.web-proxy.address in yarn-site.xml. The proxyserver did start and I >> tried getting the JSON response using the following command : >> >> curl --compressed -H "Accept: application/json" -X GET " >> >>http://localhost:8090/proxy/application_1341823967331_0001/ws/v1/mapreduc >>e/jobs/job_1341823967331_0001 >> " >> >> However, it refused connection and below is the excerpt from the >> Proxyserver logs: >> --------- >> 2012-07-09 14:26:40,402 INFO org.mortbay.log: Extract >> >>jar:file:/home/prajakta/Projects/IRL/hadoop-common/hadoop-dist/target/had >>oop-3.0.0-SNAPSHOT/share/hadoop/mapreduce/hadoop-yarn-common-3.0.0-SNAPSH >>OT.jar!/webapps/proxy >> to /tmp/Jetty_localhost_8090_proxy____.ak3o30/webapp >> 2012-07-09 14:26:40,992 INFO org.mortbay.log: Started >> SelectChannelConnector@localhost:8090 >> 2012-07-09 14:26:40,993 INFO >> org.apache.hadoop.yarn.service.AbstractService: >> Service:org.apache.hadoop.yarn.server.webproxy.WebAppProxy is started. >> 2012-07-09 14:26:40,993 INFO >> org.apache.hadoop.yarn.service.AbstractService: >> Service:org.apache.hadoop.yarn.server.webproxy.WebAppProxyServer is >>started. >> 2012-07-09 14:33:26,039 INFO >> org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet: dr.who is >> accessing unchecked >> http://prajakta:44314/ws/v1/mapreduce/jobs/job_1341823967331_0001 which >> is the app master GUI of application_1341823967331_0001 owned by >>prajakta >> 2012-07-09 14:33:29,277 INFO >> org.apache.commons.httpclient.HttpMethodDirector: I/O exception >> (org.apache.commons.httpclient.NoHttpResponseException) caught when >> processing request: The server prajakta failed to respond >> 2012-07-09 14:33:29,277 INFO >> org.apache.commons.httpclient.HttpMethodDirector: Retrying request >> 2012-07-09 14:33:29,284 WARN org.mortbay.log: >> >>/proxy/application_1341823967331_0001/ws/v1/mapreduce/jobs/job_1341823967 >>331_0001: >> java.net.SocketException: Connection reset >> 2012-07-09 14:37:33,834 INFO >> org.apache.hadoop.yarn.server.webproxy.WebAppProxyServlet: dr.who is >> accessing unchecked >> >>http://prajakta:19888/jobhistory/job/job_1341823967331_0001/jobhistory/jo >>b/job_1341823967331_0001which is the app master GUI of >>application_1341823967331_0001 owned by >> prajakta >> --------------- >> >> I am not sure why http request object is setting my remoteUser to >>dr.who. >> :( >> >> I gather from <https://issues.apache.org/jira/browse/MAPREDUCE-2858> >>that >> this warning is posted only in case where security is disabled. I assume >> that the proxy server is not disabled if security is disabled. >> >> Any idea what could be the reason for this I/O exception? Am I missing >> setting any property for proper access. Please let me know. >> >> Regards, >> Prajakta >> >> >> >> >> >> >> On Fri, Jul 6, 2012 at 10:59 PM, Prajakta Kalmegh >><pkalm...@gmail.com>wrote: >> >>> I am using hadoop trunk (forked from github). It supports RESTful APIs >>>as >>> I am able to retrieve JSON objects for RM (cluster/nodes info)+ >>> Historyserver. The only issue is with AppMaster REST API. >>> >>> Regards, >>> Prajakta >>> >>> >>> >>> On Fri, Jul 6, 2012 at 10:55 PM, Robert Evans >>><ev...@yahoo-inc.com>wrote: >>> >>>> What version of hadoop are you using? It could be that the version >>>>you >>>> have does not have the RESTful APIs in it yet, and the proxy is >>>>working >>>> just fine. >>>> >>>> --Bobby Evans >>>> >>>> On 7/6/12 12:06 PM, "Prajakta Kalmegh" <pkalm...@gmail.com> wrote: >>>> >>>> >Robert , Thanks for the response. If I do not provide any explicit >>>> >configuration for the proxy server, do I still need to start it using >>>> the >>>> >'yarn start proxy server'? I am currently not doing it. >>>> > >>>> >Also, I am able to access the html page for proxy using the >>>> ><http://localhost:8088/proxy/{appid}/mapreduce/jobs> URL. (Note this >>>> url >>>> >does not have the '/ws/v1/ part in it. I get the html response when I >>>> >query >>>> >for this URL in runtime. >>>> > >>>> >So I assume the proxy server must be starting fine since I am able to >>>> >access this URL. I will try logging more details tomorrow from my >>>>office >>>> >machine and will let you know the result. >>>> > >>>> >Regards, >>>> >Prajakta >>>> > >>>> > >>>> > >>>> >On Fri, Jul 6, 2012 at 10:22 PM, Robert Evans <ev...@yahoo-inc.com> >>>> wrote: >>>> > >>>> >> Sorry I did not respond sooner. The default behavior is to have >>>>the >>>> >>proxy >>>> >> server run as part of the RM. I am not really sure why it is not >>>> doing >>>> >> this in your case. If you set the config yourself to be a URI >>>>that is >>>> >> different from that of the RM then you need to launch a standalone >>>> proxy >>>> >> server. You can do this by running >>>> >> >>>> >> yarn start proxy server >>>> >> >>>> >> Without sitting down with you it is going to be somewhat difficult >>>>to >>>> >> debug why this is happening. However, in retrospect it would be >>>>nice >>>> to >>>> >> add in some extra logging to help indicate why the proxy server is >>>>not >>>> >> functioning as desired. If you could file a JIRA to add in the >>>> logging >>>> >>I >>>> >> would be happy to provide a patch to you and we can try and debug >>>>the >>>> >> issue further. Please file it under the MAPREDUCE JIRA project. >>>> >> >>>> >> --Bobby >>>> >> >>>> >> On 7/6/12 3:29 AM, "Prajakta Kalmegh" <pkalm...@gmail.com> wrote: >>>> >> >>>> >> >Re-posting as I haven't got a solution yet. Sorry for spamming. I >>>> >>won't be >>>> >> >able to proceed in my code until I get a JSON response using >>>> AppMaster >>>> >> >REST >>>> >> >URL. :( >>>> >> > >>>> >> >Thanks, >>>> >> >Prajakta >>>> >> > >>>> >> > >>>> >> >On Wed, Jul 4, 2012 at 5:55 PM, Prajakta Kalmegh >>>><pkalm...@gmail.com >>>> > >>>> >> >wrote: >>>> >> > >>>> >> >> Hi Robert/Harsh >>>> >> >> >>>> >> >> Thanks for your reply. >>>> >> >> >>>> >> >> My RM is starting just fine. The problem is with the use of >>>> >> >>http://<proxy httpddress:port>/proxy/{appid}/ws/v1/mapreduce >>>> >> >> to get the JSON response. >>>> >> >> >>>> >> >> As I said before, I had not configured the >>>>yarn.web-proxy.address >>>> >> >>property in yarn-site.xml. I assumed it will use the RM's >>>> >> >>yarn.resourcemanager.webapp.address property value as default. >>>> >>However, >>>> >> >>it gives me a '404-Page not found error'. Today I tried >>>>specifying >>>> a >>>> >> >>value explicitly for the yarn.web-proxy.address property. >>>> >> >> >>>> >> >> On running the wordcount example, it even gives a url >>>> >> >><http://localhost:8090>/proxy/{appid}/> to track the App Mast >>>>info. >>>> >> >>However, I am still not able to get a json response. >>>> >> >> >>>> >> >> Also, I tried to get the data from historyserver instead of >>>>runtime >>>> >> >>using the instructions given on page >>>> >> >>< >>>> >> >>>> >>>>http://hadoop.apache.org/common/docs/r2.0.0-alpha/hadoop-yarn/hadoop-ya >>>>r >>>> >> >>n-site/HistoryServerRest.html> >>>> >> >> >>>> >> >> HistoryServer REST response does not give me jobids >>>>corresponding >>>> to >>>> >>an >>>> >> >>application. It just lists all the jobs run until now. By the >>>>way, >>>> the >>>> >> >>documentation does say >>>> >> >> >>>> >> >> ---------- >>>> >> >> >>>> >> >> "Both of the following URI's give you the history server >>>> information, >>>> >> >>from an application id identified by the appid value. >>>> >> >> * http://<history server http address:port>/ws/v1/history >>>> >> >> * http://<history server http >>>>address:port>/ws/v1/history/info" >>>> >> >> --------- >>>> >> >> >>>> >> >> But there is no provision to specify the application id with >>>>these >>>> >>REST >>>> >> >>URLs. >>>> >> >> >>>> >> >> Any idea how I can get the Application Master REST working and >>>>also >>>> >> >>linking jobids to application id using the HistoryServerREST API? >>>> >> >> >>>> >> >> Any help is appreciated. Thanks in advance. >>>> >> >> Regards, >>>> >> >> Prajakta >>>> >> >> >>>> >> >> >>>> >> >> >>>> >> >> >>>> >> >> On Fri, Jun 29, 2012 at 8:55 PM, Robert Evans >>>><ev...@yahoo-inc.com >>>> > >>>> >> >>wrote: >>>> >> >> >>>> >> >>> Please don't file that JIRA. The proxy server is intended to >>>> front >>>> >>the >>>> >> >>> web server for all calls to the AM. This is so you only have >>>>to >>>> go >>>> >>to >>>> >> >>>a >>>> >> >>> single location to get to any AM's web service. The proxy >>>>server >>>> >>is a >>>> >> >>> very simple proxy and just forwards the extra part of the path >>>>on >>>> to >>>> >> >>>the >>>> >> >>> AM. >>>> >> >>> >>>> >> >>> If you are having issues with this please include the version >>>>you >>>> >>are >>>> >> >>> having problems with. Also please look at the logs for the RM >>>>on >>>> >> >>>startup >>>> >> >>> to see if there is anything there indicating why it is not >>>> starting >>>> >>up. >>>> >> >>> >>>> >> >>> --Bobby Evans >>>> >> >>> >>>> >> >>> On 6/28/12 9:46 AM, "Harsh J" <ha...@cloudera.com> wrote: >>>> >> >>> >>>> >> >>> >As far as I can tell, the MR WebApp, as the name itself >>>>indicates >>>> >>on >>>> >> >>> >its doc page, starts only at the MR AM (which may be running >>>>at >>>> any >>>> >> >>> >NM), and it starts as an ephemeral port logged at in the AM >>>>logs >>>> >> >>> >usually as: >>>> >> >>> > >>>> >> >>> >INFO Web app /mapreduce started at [PORT] >>>> >> >>> > >>>> >> >>> >That it starts its own server with an ephemeral access point >>>> makes >>>> >> >>> >sense, since each job uses its own AM and having a common >>>> location >>>> >>may >>>> >> >>> >not work with the form of REST API documented at your link. >>>>Can >>>> you >>>> >> >>> >please file a JIRA to fix the doc and remove the proxy server >>>> refs, >>>> >> >>> >which are misleading? >>>> >> >>> > >>>> >> >>> >Do correct me if I'm wrong. >>>> >> >>> > >>>> >> >>> >On Thu, Jun 28, 2012 at 6:13 PM, Prajakta Kalmegh >>>> >><pkalm...@gmail.com >>>> >> > >>>> >> >>> >wrote: >>>> >> >>> >> Hi >>>> >> >>> >> >>>> >> >>> >> I am trying to get the ApplicationMaster info using the >>>> >> >>><http://<proxy >>>> >> >>> >>http >>>> >> >>> >> address:port>/proxy/{appid}/ws/v1/mapreduce/info> link as >>>> >>described >>>> >> >>>on >>>> >> >>> >>the < >>>> >> >>> >> >>>> >> >>> >> >>>> >> >>> >>>> >> >>> >>>> >> >>>> >>>>http://hadoop.apache.org/common/docs/r2.0.0-alpha/hadoop-yarn/hadoop-ya >>>>r >>>> >> >>>n >>>> >> >>> >>-site/MapredAppMasterRest.html> >>>> >> >>> >> page. >>>> >> >>> >> >>>> >> >>> >> I am able to access and retrieve JSON response for other >>>> modules >>>> >> >>> >> (ResourceManager, NodeManager and HistoryServer). However, >>>>I am >>>> >> >>>getting >>>> >> >>> >> 'Page not found' when I try to use my ResourceManager Http >>>> >>address >>>> >> >>>to >>>> >> >>> >> access the ApplicationMaster info. I am using < >>>> >> >>> >> http://localhost:8088/proxy/{appid}/ws/v1/mapreduce/info> to >>>> >> >>>retrieve >>>> >> >>> >>JSON >>>> >> >>> >> response. >>>> >> >>> >> >>>> >> >>> >> The instructions say "The application master should be >>>>accessed >>>> >>via >>>> >> >>>the >>>> >> >>> >> proxy. This proxy is configurable to run either on the >>>>resource >>>> >> >>>manager >>>> >> >>> >>or >>>> >> >>> >> on a separate host." >>>> >> >>> >> >>>> >> >>> >> My yarn-default.xml contains: >>>> >> >>> >> <property> >>>> >> >>> >> <description>The address for the web proxy as HOST:PORT, >>>>if >>>> >>this >>>> >> >>>is >>>> >> >>> >>not >>>> >> >>> >> given then the proxy will run as part of the >>>> RM</description> >>>> >> >>> >> <name>yarn.web-proxy.address</name> >>>> >> >>> >> <value/> >>>> >> >>> >> </property> >>>> >> >>> >> >>>> >> >>> >> and I did not set a value explicitly in yarn-site.xml. Any >>>> idea >>>> >> >>>how I >>>> >> >>> >>can >>>> >> >>> >> get this working? Thanks in advance. >>>> >> >>> >> >>>> >> >>> >> Regards, >>>> >> >>> >> Prajakta >>>> >> >>> > >>>> >> >>> > >>>> >> >>> > >>>> >> >>> >-- >>>> >> >>> >Harsh J >>>> >> >>> >>>> >> >>> >>>> >> >> >>>> >> >>>> >> >>>> >>>> >>> >>
