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Nishan
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Champion Alumni

Re: Configuration setting via Cloudera Manager to ...

by Champion Alumni in Support Questions
‎02-01-2019 02:39 PM
‎02-01-2019 02:39 PM
@Harsh J How  would I do this   just for   one job ?.   I tried using  below  setting but it is not working. The issue is that I want to  use a version of jersey which I bundled into my fat jar,however  gateway node  has an older version of  that jar and it loads a class from  there resulting in a NosSuchMethodException .My application is not a map reduce job and I run it by using  hadoop jar and running on 5.14.4   export HADOOP_USER_CLASSPATH_FIRST=true export HADOOP_CLASSPATH=/projects/poc/test/config:$HADOOP_CLASSPATH ... View more

Small Avro Files

by Champion Alumni in Support Questions
‎11-20-2017 01:48 PM
‎11-20-2017 01:48 PM
Hello,   We have a  use case for ingesting binary files from mainframe to HDFS in avro format.These binary files contain  different record types that are variable in length .The first 4 bytes denotes the length of  the record.I have written a stand alone java program to  ingest the data  to hdfs using Avro DataFileWriter.Now these files from  mainframe are much smaller in size (under a block size) and creates small files . Some of the   options we came up with  to avoid these are    1. Convert the batch process to more   of a  service that runs behind the scene ,so the avro datafile writer can keep running and flush the data based on certain interval (time/size ) . I do not see a default implementation  for this  right now . 2. Write the data into an hdfs tmp location,merge the files   every hour or so and move the files to final hdfs destination. We can afford a latency of an hour before  data is made available to consumers.   3. Make use of avro append functionality.   Appreciate  your help! ... View more
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Re: Using Pig to Load data from avro backed hive ...

by Champion Alumni in Support Questions
‎03-07-2016 04:33 PM
‎03-07-2016 04:33 PM
Thanks Harsh. Yes my key  was  a void .So I changed the avro output  to use keyOutputformat (earlier value is now the key) from Avrokeyvalueoutputformat and it worked.   Thanks, Nishanth ... View more

Using Pig to Load data from avro backed hive tabl...

by Champion Alumni in Support Questions
‎02-12-2016 11:22 AM
‎02-12-2016 11:22 AM
Hello, I am trying to load data from from avro backed hive table in  a pig script using the below command  A = LOAD 'dev.avro_test' USING  org.apache.hive.hcatalog.pig.HCatLoader(); We are running into the below error.Request to give some direction.We are using CDH 5.5.1.   2016-02-12 19:21:26,515 [main] ERROR org.apache.pig.PigServer - exception during parsing: Error during parsing. Type void not present Failed to parse: Type void not present at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:198) at org.apache.pig.PigServer$Graph.parseQuery(PigServer.java:1688) at org.apache.pig.PigServer$Graph.access$000(PigServer.java:1421) at org.apache.pig.PigServer.parseAndBuild(PigServer.java:354) at org.apache.pig.PigServer.executeBatch(PigServer.java:379) at org.apache.pig.PigServer.executeBatch(PigServer.java:365) at org.apache.pig.tools.grunt.GruntParser.executeBatch(GruntParser.java:140) at org.apache.pig.tools.grunt.GruntParser.processDump(GruntParser.java:769) at org.apache.pig.tools.pigscript.parser.PigScriptParser.parse(PigScriptParser.java:372) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:198) at org.apache.pig.tools.grunt.GruntParser.parseStopOnError(GruntParser.java:173) at org.apache.pig.tools.grunt.Grunt.exec(Grunt.java:84) at org.apache.pig.Main.run(Main.java:484) at org.apache.pig.Main.main(Main.java:158) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at org.apache.hadoop.util.RunJar.run(RunJar.java:221) at org.apache.hadoop.util.RunJar.main(RunJar.java:136) Caused by: java.lang.TypeNotPresentException: Type void not present at org.apache.hive.hcatalog.data.schema.HCatFieldSchema$Type.getPrimitiveHType(HCatFieldSchema.java:92) at org.apache.hive.hcatalog.data.schema.HCatFieldSchema.<init>(HCatFieldSchema.java:226) at org.apache.hive.hcatalog.data.schema.HCatSchemaUtils.getHCatFieldSchema(HCatSchemaUtils.java:122) at org.apache.hive.hcatalog.data.schema.HCatSchemaUtils.getHCatFieldSchema(HCatSchemaUtils.java:115) at org.apache.hive.hcatalog.common.HCatUtil.getHCatFieldSchemaList(HCatUtil.java:151) at org.apache.hive.hcatalog.common.HCatUtil.getTableSchemaWithPtnCols(HCatUtil.java:184) at org.apache.hive.hcatalog.pig.HCatLoader.getSchema(HCatLoader.java:216) at org.apache.pig.newplan.logical.relational.LOLoad.getSchemaFromMetaData(LOLoad.java:175) at org.apache.pig.newplan.logical.relational.LOLoad.<init>(LOLoad.java:89) at org.apache.pig.parser.LogicalPlanBuilder.buildLoadOp(LogicalPlanBuilder.java:853) at org.apache.pig.parser.LogicalPlanGenerator.load_clause(LogicalPlanGenerator.java:3568) at org.apache.pig.parser.LogicalPlanGenerator.op_clause(LogicalPlanGenerator.java:1625) at org.apache.pig.parser.LogicalPlanGenerator.general_statement(LogicalPlanGenerator.java:1102) at org.apache.pig.parser.LogicalPlanGenerator.statement(LogicalPlanGenerator.java:560) at org.apache.pig.parser.LogicalPlanGenerator.query(LogicalPlanGenerator.java:421) at org.apache.pig.parser.QueryParserDriver.parse(QueryParserDriver.java:188) ... 19 more 2016-02-12 19:21:26,518 [main] ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: Type void not present ... View more

Re: Re writing Avro map reduce to Parquet map redu...

by Champion Alumni in Support Questions
‎12-04-2015 12:46 PM
‎12-04-2015 12:46 PM
I tried using AvroParquetOutputFormat and MultipleOutputs class and was able to generate parquet files for a specific schema type.For the other schema type I am running into the below error.Any help is appreciated?   java.lang.ArrayIndexOutOfBoundsException: 2820 at org.apache.parquet.io.api.Binary.hashCode(Binary.java:489) at org.apache.parquet.io.api.Binary.access$100(Binary.java:34) at org.apache.parquet.io.api.Binary$ByteBufferBackedBinary.hashCode(Binary.java:382) at org.apache.parquet.it.unimi.dsi.fastutil.objects.Object2IntLinkedOpenHashMap.getInt(Object2IntLinkedOpenHashMap.java:587) at org.apache.parquet.column.values.dictionary.DictionaryValuesWriter$PlainBinaryDictionaryValuesWriter.writeBytes(DictionaryValuesWriter.java:235) at org.apache.parquet.column.values.fallback.FallbackValuesWriter.writeBytes(FallbackValuesWriter.java:162) at org.apache.parquet.column.impl.ColumnWriterV1.write(ColumnWriterV1.java:203) at org.apache.parquet.io.MessageColumnIO$MessageColumnIORecordConsumer.addBinary(MessageColumnIO.java:347) at org.apache.parquet.avro.AvroWriteSupport.writeValue(AvroWriteSupport.java:257) at org.apache.parquet.avro.AvroWriteSupport.writeRecordFields(AvroWriteSupport.java:167) at org.apache.parquet.avro.AvroWriteSupport.writeRecord(AvroWriteSupport.java:149) at org.apache.parquet.avro.AvroWriteSupport.writeValue(AvroWriteSupport.java:262) at org.apache.parquet.avro.AvroWriteSupport.writeRecordFields(AvroWriteSupport.java:167) at org.apache.parquet.avro.AvroWriteSupport.write(AvroWriteSupport.java:142) at org.apache.parquet.hadoop.InternalParquetRecordWriter.write(InternalParquetRecordWriter.java:121) at org.apache.parquet.hadoop.ParquetRecordWriter.write(ParquetRecordWriter.java:123) at org.apache.parquet.hadoop.ParquetRecordWriter.write(ParquetRecordWriter.java:42) at org.apache.hadoop.mapreduce.lib.output.LazyOutputFormat$LazyRecordWriter.write(LazyOutputFormat.java:115) at org.apache.hadoop.mapreduce.lib.output.MultipleOutputs.write(MultipleOutputs.java:457) at com.visa.dps.mapreduce.logger.LoggerMapper.map(LoggerMapper.java:271) ... View more

Re writing Avro map reduce to Parquet map reduce

by Champion Alumni in Support Questions
‎12-04-2015 10:16 AM
‎12-04-2015 10:16 AM
Hello All,   We have a  java map reduce application which reads in binary files does some  data processing and converts to avro data.Currently we have two avro schemas and use Avromultipleoutputs class to write to multiple locations based on the schema.After we did  some  research we found that it would be   beneficial if we could store the data as parquet.What is the best way to do this?Should I change the native map reduce  to convert from avro to parquet or is there some other utility that I can use?.   Thanks, Nishan ... View more

Re: How to restore a down replica ?

by Champion Alumni in Support Questions
‎11-23-2015 09:24 PM
‎11-23-2015 09:24 PM
Can you get  the trace for that  particular solr replica logs?.If your tlogs are large it could be  replaying those but then  it would normally  been in recovery state.Are your tlogs are corrupt?. ... View more

Re: how to suppress mapper output files if the out...

by Champion Alumni in Support Questions
‎11-23-2015 02:49 PM
‎11-23-2015 02:49 PM
The issue in my case was I was not closing the avromultipleoutputs instance in the mapper.Combination of lazyoutputformat and closing the avromultipleoutputs instance in the mapper fixed the issue for me. ... View more

Re: how to suppress mapper output files if the out...

by Champion Alumni in Support Questions
‎09-10-2015 03:19 PM
‎09-10-2015 03:19 PM
Hello  Harsh,   I tried the same  for  AvroMultipleOut files and  this still generates   empty avro files.Should something in addition be done  when we are using Avro MultipleOutputs?I am using avro 1.7.7 and CDH 5.4.Please let me know if you have faced  this issue.   Thanks, Nishanth     ... View more

Re: Cloudera Search: How HDFS replica and shards/r...

by Champion Alumni in Support Questions
‎02-12-2015 01:06 PM
‎02-12-2015 01:06 PM
I would probably suggest using  curl command to add replica  and not the solr UI.This is the wiki reference on how  you  can do that using the collection APIs.   https://cwiki.apache.org/confluence/display/solr/Collections+API#CollectionsAPI-api_addreplica   You may want to do this during a quite time as it would have more I/O on the system,again depends on what your cluster environment and index size looks like.   Thanks, Nishan ... View more
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