1. Hadoop MapReduce - Pig/Cassandra - Unable to create input splits stackoverflow.comI'm trying to run a MapReduce Job with Pig and Cassandra and I always get the error: ERROR 2118: Unable to create input splits for: cassandra://constellation/logs [SOLVED] There were some environment variables I missed ... |
2. Using mahout and hadoop stackoverflow.comI am a newbie trying to understand how will mahout and hadoop be used for collaborative filtering. I m having single node cassandra setup. I want to fetch data from cassandra ... |
3. Cassandra wih Hive stackoverflow.comAm new in cassandra and Hive. Now i want integrate cassandra with the Hadoop-Hive but how can i integrate the cassandra with Hive. Thanks in advance venkat.N |
4. cassandra pig insertion exception stackoverflow.comI am using pig CassandraStroage() to insert a big data set into cassandra, after running 4 hours, it crashed with the following exception: |
5. why Mutation does not make inserts for existing columns stackoverflow.comI am loading initial data (url list for a crawler) to Cassandra with status crawled=0. Then using Hadoop I crawl all the links and try to change crawled from 0 to ... |
6. Cassandra InvalidRequestException(why:[MyKeyspace][MyColumnFamily][6675...6c74] = [6c86......e65720] failed validation (String didn't validate.)) stackoverflow.comI am using Cassandra with Hadoop for input and output. During the output reduce job, I got an error: |
7. Cassandra setInputSplitSize is not working properly stackoverflow.comI am using Hadoop + Cassandra. I use setInputSplitSize(1000) to not overload mappers (and receive out of heap memory) as default it is 64K. All together I have only 2M lines ... |
8. Cassandra Upgrade 0.8.2->0.8.4 get error "failed connecting to all endpoints" stackoverflow.comAfter upgrade of cassandra from 0.8.2 to 0.8.4, got this error I have restarted cassandra, removed data, etc. nothing helps I have 6 identical machines in the cloud, before it was working fine. If ... |
9. How to increase cassandra write performance using hadoop map reduce? stackoverflow.comI am uploading data to Cassandra-0.7.8 using hadoop map/reduce program. To upload 9G of data to cluster of 3 nodes with RF=3 is taking 3.15 hrs. Bleow are my mapper class code ... |