Hi. Sorry about the "fake sender" in the subject of the original message. Our mail security system is funny like that...
Anyhow, we discovered that distcp puts a temp file name in place and then tries to do a PUT (copy) that copy the file to the permanent name. From the documentation that doesn't appear to be supported by Riak. http://docs.basho.com/riakcs/latest/references/apis/storage/RiakCS-PUT-Object-Copy/ I still would like to hear if anyone else has had success with distcp. Maybe there is another version out there that works differently. Thanks, Dan From: riak-users [mailto:[email protected]] On Behalf Of Sajner, Daniel G Sent: Tuesday, July 09, 2013 7:56 AM To: '[email protected]' Subject: [PMX:FAKE_SENDER] Using Hadoop distcp to load data into Riak-CS Hi. I'm trying to load data from a Hadoop cluster using distcp. Distcp supports the S3 API, but I'm running into issues. Has anyone tested/had success with this process? Any help is appreciated! Details below... Thanks, Dan Here's my setup: Hadoop cluster with a small text file in hdfs. Jets3t.properties file configured to use a proxy host. Proxy host running Varnish basically to serve as a load balancer at this point. All caching is currently disabled. Riak-CS/Riak running on a 6 server cluster. Here's the scenario: I'm running this command... Ø hadoop distcp -libjars ./jets3t-config.jar hdfs://hadoop.node.address/user/dan/test.txt s3n://riak-user-key:riak-secret@testing/ I see many requests and responses in the varnishlog so I know communication is succeeding. The distcp process throws an exception and I see empty files and directories left on my Riak system. The exception looks like this: 13/07/08 15:52:42 INFO tools.DistCp: sourcePathsCount=1 13/07/08 15:52:42 INFO tools.DistCp: filesToCopyCount=1 13/07/08 15:52:42 INFO tools.DistCp: bytesToCopyCount=93.0 13/07/08 15:52:42 INFO mapred.JobClient: Running job: job_201307031542_0023 13/07/08 15:52:43 INFO mapred.JobClient: map 0% reduce 0% 13/07/08 15:52:50 INFO mapred.JobClient: Job complete: job_201307031542_0023 13/07/08 15:52:50 INFO mapred.JobClient: Counters: 6 13/07/08 15:52:50 INFO mapred.JobClient: Job Counters 13/07/08 15:52:50 INFO mapred.JobClient: SLOTS_MILLIS_MAPS=6980 13/07/08 15:52:50 INFO mapred.JobClient: Total time spent by all reduces waiting after reserving slots (ms)=0 13/07/08 15:52:50 INFO mapred.JobClient: Total time spent by all maps waiting after reserving slots (ms)=0 13/07/08 15:52:50 INFO mapred.JobClient: Launched map tasks=1 13/07/08 15:52:50 INFO mapred.JobClient: SLOTS_MILLIS_REDUCES=0 13/07/08 15:52:50 INFO mapred.JobClient: Failed map tasks=1 13/07/08 15:52:50 INFO mapred.JobClient: Job Failed: NA With failures, global counters are inaccurate; consider running with -i Copy failed: java.io.IOException: Job failed! at org.apache.hadoop.mapred.JobClient.runJob(JobClient.java:1246) at org.apache.hadoop.tools.DistCp.copy(DistCp.java:667) at org.apache.hadoop.tools.DistCp.run(DistCp.java:881) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79) at org.apache.hadoop.tools.DistCp.main(DistCp.java:908) And Riak is left like this: Ø s3cmd ls s3://testing DIR s3://testing/_distcp_logs_7bhq3z/ DIR s3://testing/_distcp_logs_j9re3f/ 2013-07-09 03:54 0 s3://testing/_distcp_logs_7bhq3z_$folder$ 2013-07-09 00:03 0 s3://testing/_distcp_logs_j9re3f_$folder$ 2013-07-08 19:52 0 s3://testing/test.txt Confidentiality Notice: This electronic message transmission, including any attachment(s), may contain confidential, proprietary, or privileged information from Chemical Abstracts Service ("CAS"), a division of the American Chemical Society ("ACS"). If you have received this transmission in error, be advised that any disclosure, copying, distribution, or use of the contents of this information is strictly prohibited. Please destroy all copies of the message and contact the sender immediately by either replying to this message or calling 614-447-3600. Confidentiality Notice: This electronic message transmission, including any attachment(s), may contain confidential, proprietary, or privileged information from Chemical Abstracts Service ("CAS"), a division of the American Chemical Society ("ACS"). If you have received this transmission in error, be advised that any disclosure, copying, distribution, or use of the contents of this information is strictly prohibited. Please destroy all copies of the message and contact the sender immediately by either replying to this message or calling 614-447-3600.
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