Dear Andrea, As you have noticed, this is a problem regarding the Hadoop version (pretty old) we are running at the global instance. This will be fixed once we release the new global instance (end of the year/start of the new one), running a modern version of Hadoop based on Hortonworks. Thanks for the feedback. Regards, Francisco El 1/12/15 17:05, "Manuel Escriche (JIRA)" <jira-help-desk at fi-ware.org> escribió: > > [ >https://jira.fiware.org/browse/HELP-5439?page=com.atlassian.jira.plugin.sy >stem.issuetabpanels:all-tabpanel ] > >Manuel Escriche reassigned HELP-5439: >------------------------------------- > > Assignee: Francisco Romero > >> [Fiware-tech-help] Issue on Cosmos Global Instance: cannot transfer >>file parts >> >>------------------------------------------------------------------------- >>----- >> >> Key: HELP-5439 >> URL: https://jira.fiware.org/browse/HELP-5439 >> Project: Help-Desk >> Issue Type: extRequest >> Components: FIWARE-TECH-HELP >> Reporter: FW External User >> Assignee: Francisco Romero >> >> Dear FIWARE Staff, >> I would like to report a potential issue on the *Cosmos Global >>Instance*. >> We are using Cosmos to store input files for Hadoop jobs and their >>related >> output. We are transferring them from/to a remote back-end through the >> WebHDFS API. >> During outbound transfers of large files from Cosmos, the need to split >>the >> file content in parts has risen. If we use a simple OPEN operation like >> *http://<HOST>:<PORT>/webhdfs/v1/<PATH>?op=OPEN * >> the transfer is interrupted after 2 minutes even if the response has not >> transferred completely to the client. This should due to the timeout >> configuration of the HTTP Server deployed on Cosmos. >> As suggested by the WebHDFS API Doc >> <https://hadoop.apache.org/docs/r1.0.4/webhdfs.html#OPEN>, one should >> consider to transfer single parts of the requested file by setting >>*offset* >> and *length* parameters to complete the request successfully. >> The issue we found is that the *length* parameter seems to be ignored by >> the HTTP Server. >> For example, if we execute the following >> *http://<HOST>:<PORT>/webhdfs/v1/<PATH>?op=OPEN&offset=100&length=10* >> on a 200 bytes file, we would get the last 100 bytes of the file itself, >> and not bytes from 101 to 110. >> We checked the current version of Hadoop deployed on Cosmos and we found >> out that release *0.20.2-cdh3u6 *is currently running. By giving a look >>to >> the HDFS changelogs >> >><https://hadoop.apache.org/docs/r0.23.11/hadoop-project-dist/hadoop-hdfs/ >>CHANGES.txt>, >> there is an improvement (HDFS-3794) committed in release 0.23.3 that >>could >> be potentially related to the reported occurrence. >> Best Regards, >> Andrea Sassi >> Since January 1st, old domains won't be supported and messages sent to >>any domain different to @lists.fiware.org will be lost. >> Please, send your messages using the new domain >>(Fiware-tech-help at lists.fiware.org) instead of the old one. >> _______________________________________________ >> Fiware-tech-help mailing list >> Fiware-tech-help at lists.fiware.org >> https://lists.fiware.org/listinfo/fiware-tech-help >> [Created via e-mail received from: Andrea Sassi <brainswitch at gmail.com>] > > > >-- >This message was sent by Atlassian JIRA >(v6.4.1#64016) ________________________________ Este mensaje y sus adjuntos se dirigen exclusivamente a su destinatario, puede contener información privilegiada o confidencial y es para uso exclusivo de la persona o entidad de destino. Si no es usted. el destinatario indicado, queda notificado de que la lectura, utilización, divulgación y/o copia sin autorización puede estar prohibida en virtud de la legislación vigente. Si ha recibido este mensaje por error, le rogamos que nos lo comunique inmediatamente por esta misma vía y proceda a su destrucción. The information contained in this transmission is privileged and confidential information intended only for the use of the individual or entity named above. If the reader of this message is not the intended recipient, you are hereby notified that any dissemination, distribution or copying of this communication is strictly prohibited. If you have received this transmission in error, do not read it. Please immediately reply to the sender that you have received this communication in error and then delete it. Esta mensagem e seus anexos se dirigem exclusivamente ao seu destinatário, pode conter informação privilegiada ou confidencial e é para uso exclusivo da pessoa ou entidade de destino. Se não é vossa senhoria o destinatário indicado, fica notificado de que a leitura, utilização, divulgação e/ou cópia sem autorização pode estar proibida em virtude da legislação vigente. Se recebeu esta mensagem por erro, rogamos-lhe que nos o comunique imediatamente por esta mesma via e proceda a sua destruição
You can get more information about our cookies and privacy policies clicking on the following links: Privacy policy Cookies policy