Googled around and find this little trick: export JAVA_OPTS=-Xmx2048m
It works now, thanks professor! — Zichuan Wang Department of Computer Science, USC On Wed, Nov 5, 2014 at 10:40 PM, Mattmann, Chris A (3980) <[email protected]> wrote: > Got it. Can you increase the heap space on your batch stub? That > should take care of it. > Cheers, > Chris > P.S. Great work! > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Chris Mattmann, Ph.D. > Chief Architect > Instrument Software and Science Data Systems Section (398) > NASA Jet Propulsion Laboratory Pasadena, CA 91109 USA > Office: 168-519, Mailstop: 168-527 > Email: [email protected] > WWW: http://sunset.usc.edu/~mattmann/ > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > Adjunct Associate Professor, Computer Science Department > University of Southern California, Los Angeles, CA 90089 USA > ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > -----Original Message----- > From: Zichuan Wang <[email protected]> > Date: Wednesday, November 5, 2014 at 11:12 PM > To: Chris Mattmann <[email protected]> > Cc: Chris Mattmann <[email protected]>, "[email protected]" > <[email protected]>, Luke liu <[email protected]>, "[email protected]" > <[email protected]>, "[email protected]" <[email protected]> > Subject: Re: re： Question about OODT file manager >>Dear Professor, >> >> >>I finally figured out how to trigger a post ingest event. However when I >>try to crawl the whole dataset, I got an OutOfMemory Error. Could you >>please take a look and maybe give some suggestions? >> >> >>➜ bin ./crawler_launcher \ >>--operation --launchAutoCrawler \ >>--filemgrUrl http://localhost:9000 \ >>--clientTransferer >>org.apache.oodt.cas.filemgr.datatransfer.LocalDataTransferFactory \ >>--productPath /Users/zichuanwang/Downloads/output \ >>--mimeExtractorRepo ../policy/mime-extractor-map.xml \ >>--workflowMgrUrl http://localhost:9200 \ >>-ais TriggerPostIngestWorkflow >>Setting property 'AutoDetectProductCrawler.mimeExtractorRepo' >>Setting property 'StdProductCrawler.clientTransferer' >>Setting property 'MetExtractorProductCrawler.clientTransferer' >>Setting property 'AutoDetectProductCrawler.clientTransferer' >>Setting property 'StdProductCrawler.filemgrUrl' >>Setting property 'MetExtractorProductCrawler.filemgrUrl' >>Setting property 'AutoDetectProductCrawler.filemgrUrl' >>Setting property 'TriggerPostIngestWorkflow.workflowMgrUrl' >>Setting property 'StdProductCrawler.actionIds' >>Setting property 'MetExtractorProductCrawler.actionIds' >>Setting property 'AutoDetectProductCrawler.actionIds' >>Setting property 'StdProductCrawler.productPath' >>Setting property 'MetExtractorProductCrawler.productPath' >>Setting property 'AutoDetectProductCrawler.productPath' >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'StdProductCrawler.productPath' set to value >>[/Users/zichuanwang/Downloads/output] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'TriggerPostIngestWorkflow.workflowMgrUrl' set to value >>[http://localhost:9200] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'AutoDetectProductCrawler.mimeExtractorRepo' set to value >>[../policy/mime-extractor-map.xml] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'MetExtractorProductCrawler.clientTransferer' set to value >>[org.apache.oodt.cas.filemgr.datatransfer.LocalDataTransferFactory] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'AutoDetectProductCrawler.filemgrUrl' set to value >>[http://localhost:9000] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'AutoDetectProductCrawler.clientTransferer' set to value >>[org.apache.oodt.cas.filemgr.datatransfer.LocalDataTransferFactory] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'MetExtractorProductCrawler.actionIds' set to value >>[TriggerPostIngestWorkflow] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'StdProductCrawler.actionIds' set to value >>[TriggerPostIngestWorkflow] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'StdProductCrawler.filemgrUrl' set to value >>[http://localhost:9000] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'AutoDetectProductCrawler.actionIds' set to value >>[TriggerPostIngestWorkflow] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'AutoDetectProductCrawler.productPath' set to value >>[/Users/zichuanwang/Downloads/output] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'MetExtractorProductCrawler.filemgrUrl' set to value >>[http://localhost:9000] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'StdProductCrawler.clientTransferer' set to value >>[org.apache.oodt.cas.filemgr.datatransfer.LocalDataTransferFactory] >>Nov 5, 2014 10:07:47 PM >>org.springframework.beans.factory.config.PropertyOverrideConfigurer >>processKey >>: Property 'MetExtractorProductCrawler.productPath' set to value >>[/Users/zichuanwang/Downloads/output] >>Nov 5, 2014 10:07:47 PM org.apache.oodt.cas.crawl.ProductCrawler crawl >>Ϣ: Crawling /Users/zichuanwang/Downloads/output >>Exception in thread "main" java.lang.OutOfMemoryError: Java heap space >>at java.io.UnixFileSystem.list(Native Method) >>at java.io.File.list(File.java:973) >>at java.io.File.listFiles(File.java:1129) >>at org.apache.oodt.cas.crawl.ProductCrawler.crawl(ProductCrawler.java:104) >>at org.apache.oodt.cas.crawl.ProductCrawler.crawl(ProductCrawler.java:75) >>at >>org.apache.oodt.cas.crawl.cli.action.CrawlerLauncherCliAction.execute(Craw >>lerLauncherCliAction.java:58) >>at org.apache.oodt.cas.cli.CmdLineUtility.execute(CmdLineUtility.java:331) >>at org.apache.oodt.cas.cli.CmdLineUtility.run(CmdLineUtility.java:187) >>at org.apache.oodt.cas.crawl.CrawlerLauncher.main(CrawlerLauncher.java:36) >> >> >>— >>Zichuan Wang >>Department of Computer Science, USC >> >> >>On Wed, Nov 5, 2014 at 6:42 PM, Christian Alan Mattmann >><[email protected]> wrote: >> >> >>Thanks Luke, I’ve given you permissions so you should now see an >>“edit” button on that wiki page. >> >>Cheers, >>Chris >> >>++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>Chris Mattmann, Ph.D. >>Adjunct Associate Professor, Computer Science Department >>University of Southern California >>Los Angeles, CA 90089 USA >>Email: [email protected] >>WWW: http://sunset.usc.edu/~mattmann/ >>++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >> >> >> >> >>-----Original Message----- >>From: Luke liu <[email protected]> >>Date: Wednesday, November 5, 2014 at 6:48 PM >>To: Chris Mattmann <[email protected]>, "[email protected]" >><[email protected]> >>Cc: Chris Mattmann <[email protected]>, "[email protected]" >><[email protected]>, "[email protected]" <[email protected]>, 'Zichuan Wang' >><[email protected]> >>Subject: RE: re： Question about OODT file manager >> >>>I just signed up on the wiki(i.e. https://cwiki.apache.org ) with the >>>following account detail: >>> Account name: luke >>> Full Name: Shuai Liu (Luke) >>> Email: [email protected] >>> Password: ******* >>> >>>But I am not sure where I can add my notes to the following web article >>>with >>>which I had trouble , I also tried to create a new article, but failed >>>to >>>do >>>it as I cannot find a place where I can edit, does this have something >>>do >>>with my account that is not visible for the "edit" or "comments" action? >>>https://cwiki.apache.org/confluence/display/OODT/CAS-PGE+Learn+by+Example >>> >>> >>> >>>Thanks >>>Luke >>>-----Original Message----- >>>From: Mattmann, Chris A (3980) [mailto:[email protected]] >>>Sent: Sunday, November 2, 2014 6:59 AM >>>To: Luke liu; [email protected] >>>Cc: 'Christian Alan Mattmann'; [email protected]; [email protected]; >>>'Zichuan >>>Wang' >>>Subject: Re: re： Question about OODT file manager >>> >>>Yes Luke, making the instructions better would be much appreciated! >>> >>>If you have an account on the wiki please share it, else sign up for an >>>Apache OODT wiki account and please share it with me or anyone else on >>>dev@oodt and we’ll add you. >>> >>>Cheers, >>>Chris >>> >>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>Chris Mattmann, Ph.D. >>>Chief Architect >>>Instrument Software and Science Data Systems Section (398) NASA Jet >>>Propulsion Laboratory Pasadena, CA 91109 USA >>>Office: 168-519, Mailstop: 168-527 >>>Email: [email protected] >>>WWW: http://sunset.usc.edu/~mattmann/ >>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>Adjunct Associate Professor, Computer Science Department University of >>>Southern California, Los Angeles, CA 90089 USA >>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>> >>> >>> >>> >>> >>> >>>-----Original Message----- >>>From: Luke liu <[email protected]> >>>Date: Sunday, November 2, 2014 at 1:32 AM >>>To: Chris Mattmann <[email protected]>, >>>"[email protected]" >>><[email protected]> >>>Cc: Chris Mattmann <[email protected]>, "[email protected]" >>><[email protected]>, "[email protected]" <[email protected]>, 'Zichuan >>>Wang' >>><[email protected]> >>>Subject: RE: re： Question about OODT file manager >>> >>>>Thanks Professor Mattmann, not running batch_stub was the main culprit >>>>and there were some other issues such as missing jars; and sorry for >>>>not confirming this right away, my laptop was actually crashing, and i >>>>just had time to fix it; BTW, I was able to get the cas-pge example to >>>>work, (even though I saw the workflow failed to pass the pre-condition >>>>in the log, the combined file and some metadata files (i.e.3 files) >>>>were still successfully ingested and placed in the output directory) >>>> >>>>BTW, i think there are a lot of mistakes in the documents, do you want >>>>us to help correct the document(i.e. >>>>https://cwiki.apache.org/confluence/display/OODT/CAS-PGE+Learn+by+Examp >>>>le >>>>)? >>>>If possible, I would like to please share my notes with some problem >>>>steps mentioned there. >>>> >>>>Anyway, thanks for your help and appreciated. >>>> >>>>Thanks >>>>Luke >>>>-----Original Message----- >>>>From: Mattmann, Chris A (3980) [mailto:[email protected]] >>>>Sent: Saturday, November 1, 2014 10:48 AM >>>>To: Luke; [email protected] >>>>Cc: 'Christian Alan Mattmann'; [email protected]; [email protected]; >>>>'Zichuan Wang' >>>>Subject: Re: re： Question about OODT file manager >>>> >>>>Dear Luke, just confirming, we solved this in class right? It had to do >>>>with the batch stub not being turned on. >>>> >>>>Cheers, >>>>Chris >>>> >>>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>Chris Mattmann, Ph.D. >>>>Chief Architect >>>>Instrument Software and Science Data Systems Section (398) NASA Jet >>>>Propulsion Laboratory Pasadena, CA 91109 USA >>>>Office: 168-519, Mailstop: 168-527 >>>>Email: [email protected] >>>>WWW: http://sunset.usc.edu/~mattmann/ >>>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>Adjunct Associate Professor, Computer Science Department University of >>>>Southern California, Los Angeles, CA 90089 USA >>>>++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>> >>>> >>>> >>>> >>>> >>>> >>>>-----Original Message----- >>>>From: Luke <[email protected]> >>>>Date: Tuesday, October 28, 2014 at 12:52 PM >>>>To: Chris Mattmann <[email protected]>, >>>>"[email protected]" >>>><[email protected]> >>>>Cc: Chris Mattmann <[email protected]>, "[email protected]" >>>><[email protected]>, "[email protected]" <[email protected]>, 'Zichuan >>>>Wang' >>>><[email protected]> >>>>Subject: RE: re： Question about OODT file manager >>>> >>>>>Dear Professor Mattamnn, >>>>>Thanks a lot Professor Mattmann for the kind help, it is appreciated, >>>>>sorry for getting back to you with my appreciation, I have been >>>>>conducting tests with OODT based on your advice, but unfortunately I >>>>>am having another problem.... >>>>> >>>>>I am following the steps >>>>>(https://cwiki.apache.org/confluence/display/OODT/CAS-PGE+Learn+by+Exa >>>>>mpl >>>>>e >>>>>) to get a sense of how to get workflow to work. >>>>>The problem is that the File-Concatenator-PGE (by running the >>>>>wmgr-client >>>>>command-line) does not seems to be invoked or executed, but I am >>>>>seeing the tasks are getting stacked up in the workflow manager with >>>>>status either "RSUBMIT" or "QUEUED", but they are not getting >>>>>executed, >>>PFA: >>>>>workflow_monitor.jpg, please note, by default the workflow min pool >>>>>size is 6; so here comes another problem, i have 6 submitted tasks >>>>>with status RSUBMIT, but any new incoming tasks will be forwarded to >>>>>the waiting QUEUE with status "QUEUED"...please refer to the >>>>>workflow_monitor.jpg for details, where I have 3 QUEUED workflow task >>>>>and >>>6 RSUMBITE tasks. >>>>> >>>>>Question 1): not sure why the workflow is not being executed, and >>>>>hanging at the state of "RSUBMIT", after enabling the log level, I am >>>>>seeing the following entry in the log, not sure if this has anything >>>>>to do with the "hanging" problem where workflow is not getting >>>>>executed and hanging at state of "RSUBMIT". >>>>> Oct 28, 2014 3:35:07 AM >>>>>org.apache.oodt.cas.workflow.engine.IterativeWorkflowProcessorThread >>>>>safeCheckJobComplete >>>>> WARNING: Exception checking completion status for job: >>>>>[2014-10-28T01:59:32.813-07:00]: Messsage: java.lang.Exception: >>>>>java.lang.NullPointerException >>>>> >>>>>Question 2): I think currently on my side any new incoming workflow >>>>>task I am sending with the following command is being directed to the >>>>>waiting "QUEUE" because of the min pool size (i.e. 6) (I can increase >>>>>this to a larger number though), >>>>> ./wmgr-client --url http://localhost:9200 >>>>--operation --sendEvent >>>>>--eventName fileconcatenator-pge --metaData --key RunID testNumber1 >>>>> If possible, I would like to please know if there is a way we can >>>>purge >>>>>the queue and get rid of those workflow tasks either in "RSUMBIT" and >>>>>"QUEUED" I have already sent, please kindly help. >>>>> >>>>>Very sorry for troubling you with this, to be honest I find OODT a bit >>>>>challenging to grasp within a short time frame, probably because there >>>>>is no book like OODT in action like Solr.... and what I am doing is >>>>>just trial and error blended with guess, but I don’t want to make a >>>>>blind guess, it will be appreciated if you can please also shed some >>>>>lights on where I can get more information logging or other way where >>>>>I can troubleshoot. I think it might be worth tracking what is >>>>>happening when workflow reach the status "RSUBMIT" and how to get a >>>>>specific logging info specific to it... >>>>> >>>>>Again your advice and kind help will be appreciated usual. >>>>> >>>>> >>>>>Thanks >>>>>Luke >>>>> >>>>>> -----Original Message----- >>>>>> From: Mattmann, Chris A (3980) >>>>>> [mailto:[email protected]] >>>>>> Sent: 2014年10月26日 22:18 >>>>>> To: Luke; 'Zichuan Wang' >>>>>> Cc: 'Christian Alan Mattmann'; [email protected]; [email protected]; >>>>>> [email protected] >>>>>> Subject: Re: re： Question about OODT file manager >>>>>> >>>>>> Hi Luke, >>>>>> >>>>>> Thanks and sorry it’s taken me a while to reply. Here are some >>>>>>details >>>>>>below: >>>>>> >>>>>> >>>>>> -----Original Message----- >>>>>> From: Luke <[email protected]> >>>>>> Date: Sunday, October 26, 2014 at 6:19 PM >>>>>> To: Chris Mattmann <[email protected]>, 'Zichuan Wang' >>>>>> <[email protected]> >>>>>> Cc: Chris Mattmann <[email protected]>, "[email protected]" >>>>>> <[email protected]>, "[email protected]" <[email protected]>, >>>>>> "[email protected]" <[email protected]> >>>>>> Subject: RE: re： Question about OODT file manager >>>>>> >>>>>> >Hi Professor Mattmann and OODT DEV, >>>>>> > >>>>>> >Sorry to trouble you with this email, our team has been struggling >>>>>> >in the oodt to send json files to solr. >>>>>> >One of the difficulties is still getting OODT workflow to call the >>>>>> >poster.py in etllib. >>>>>> >>>>>> Sorry that you’re having difficulty let me try and help. >>>>>> >>>>>> > >>>>>> >I am not sure if my understanding is correct with OODT requirement, >>>>>> >I hope you can please kindly advice and help with our confusion. >>>>>> > >>>>>> >a set of goals in my mind with OODT is as follows, please kindly >>>>>> >confirm and clarify: >>>>>> > >>>>>> >1) >>>>>> >Get the File-Manager up and running. >>>>>> >>>>>> Yep, hopefully as installed via OODT RADIX. >>>>>> >>>>>> >2) >>>>>> >send all json files with command wmgr-client to the fileManager >>>>>>server. >>>>>> >(I believe we can achieve it with a bash script or probably python >>>>>> >that calls the command line sequentially with each json file name >>>>>> >as >>>>>>an >>>>>> >argument?!) >>>>>> >>>>>> Suggestion: >>>>>> >>>>>> 1. Use the OODT crawler and file manager to crawl/index the JSON >>>>>>files (in place data transfer). >>>>>> 2. Take a look at CAS-PGE, it will help you write a workflow task >>>>>>that will wrap ETLlib and the poster command. >>>>>> 3. Once you are confident with #2, whip up a script that pages >>>>>>through all of your indexed JSON files, and then for each one, >>>>>>submits a workflow event (you may need to look into aggregating >>>>>>them) that calls your CAS-PGE wrapped poster task from ETLlib. >>>>>> >>>>>> >3) >>>>>> >Once we have json files sent and stored in the File-Manager, we >>>>>> >need >>>>>>to >>>>>> >get workflow-manager up and running, and we can create a workflow >>>>>>that >>>>>> >send those jsons file from the file manager to solr. >>>>>> >>>>>> See above. >>>>>> >>>>>> >4) >>>>>> >Create a workflow according to >>>>>> >Workflow2 User Guide >>>>>> >>>>>>><https://cwiki.apache.org/confluence/display/OODT/Workflow2+User+Gui >>>>>>>de> >>>>>> >>>>>>>>>>> here comes the problem….. >>>>>> > I am not sure how to create a workflow task which can call >>>>>>the >>>>>> >poster.py in python etllib, it looks like we need to create our own >>>>>> >java class that extend <TaskInstance> which is an abstract Java >>>>>> >class with one abstract method that has the following signature: >>>>>> > >>>>>> > >>>>>> >protectedabstract ResultsState performExecution(ControlMetadata >>>>>> >crtlMetadata); >>>>>> > However, the detail of where to find the corresponding >>>>>> >libs and where to put our implementation in workflow manager is >>>>>> >being neglected in that page. I am not sure if we should use >>>>>> >TaskInstance, but it seems the workflow has to have an interface >>>>>> >thru which it can call the python code i.e. poster.py. and it looks >>>>>> >like we need to embody the TaskInstance::performExecution by >>>>>> >injecting the code that calls the poster.py and return the >>>resultState. >>>>>> > >>>>>> > >>>>>> >It would be greatly appreciated if you could please shed some >>>>>> >lights and advice how we can get a task instance to call the >>>>>> >poster.py. BTW, >>>>>>I >>>>>> >am also not sure if my understanding is correct, please kindly >>>>>>correct >>>>>> >it if inappropriate. Your help will be appreciated as usual. >>>>>> > >>>>>> > >>>>>> > >>>>>> >Thanks >>>>>> >Luke >>>>>> >>>>>> Thanks Luke, see above. Let me know if it helps. >>>>>> >>>>>> Cheers! >>>>>> >>>>>> Chris >>>>>> >>>>>> > >>>>>> >From: Mattmann, Chris A (3980) >>>>>> >[mailto:[email protected]] >>>>>> > >>>>>> >Sent: 2014年10月25日 >>>>>> > 13:34 >>>>>> >To: Zichuan Wang >>>>>> >Cc: Christian Alan Mattmann; Luke; [email protected]; >>>>>> >[email protected] >>>>>> >Subject: Re: 回复： Question about OODT file manager >>>>>> > >>>>>> > >>>>>> > >>>>>> >Please cc >>>>>> >[email protected] <mailto:[email protected]> I will reply in >>>>>>detail >>>>>> >soon >>>>>> > >>>>>> >Sent from my iPhone >>>>>> >>>>>> >>>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>>> ++ >>>>>> Chris Mattmann, Ph.D. >>>>>> Chief Architect >>>>>> Instrument Software and Science Data Systems Section (398) NASA Jet >>>>>> Propulsion Laboratory Pasadena, CA 91109 USA >>>>>> Office: 168-519, Mailstop: 168-527 >>>>>> Email: [email protected] >>>>>> WWW: http://sunset.usc.edu/~mattmann/ >>>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>>> ++ >>>>>> Adjunct Associate Professor, Computer Science Department University >>>>>> of Southern California, Los Angeles, CA 90089 USA >>>>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ >>>>>> ++ >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> > >>>>>> > >>>>>> >On Oct 25, 2014, at 1:26 PM, "Zichuan Wang" <[email protected]> >>>>>>wrote: >>>>>> > >>>>>> > >>>>>> >Dear Professor, >>>>>> > >>>>>> > >>>>>> > >>>>>> >Could please also explain how I can crawl all JSON file name under >>>>>> >a specific directory using CAS-PGE? I’ll work through this example >>>>>> >https://cwiki.apache.org/confluence/display/OODT/CAS-PGE+Learn+by+E >>>>>> >xam >>>>>> p >>>>>> >le, but it doesn’t mention anything about crawling, instead it >>>>>> >manually set the Input files paths... >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> >-- >>>>>> > >>>>>> >Zichuan Wang >>>>>> > >>>>>> >University of Southern California, Department of Computer Science >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> >在 2014年10月25日 星期六，下午12:10，Zichuan Wang >>>>>> >写道： >>>>>> > >>>>>> >Dear Professor, >>>>>> > >>>>>> > >>>>>> > >>>>>> >In assignment 2 specification I noticed that you mentioned OODT >>>>>> >File Manager, but from my understanding, we are using ETLLib poster >>>>>> >which talks directly to Solr. So how can we use OODT File Manager >>>>>> >in this assignment? >>>>>> > >>>>>> > >>>>>> > >>>>>> >-- >>>>>> > >>>>>> >Zichuan Wang >>>>>> > >>>>>> >University of Southern California, Department of Computer Science >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>>> > >>>>> >>>> >>>> >>> >>> >> >> >> >> >> >>
