Hi Doug, You want me to raise a bug against Avro or Hadoop-Core. My guess is avro Regards, Deepak
On Tue, Dec 24, 2013 at 12:10 AM, Doug Cutting <[email protected]> wrote: > This sounds like a bug. > > I wonder if it is similar to a related bug in Hadoop? > > https://issues.apache.org/jira/browse/HADOOP-9307 > > If so, please file an issue in Jira. > > Doug > > On Sat, Dec 21, 2013 at 4:35 AM, ÐΞ€ρ@Ҝ (๏̯͡๏) <[email protected]> > wrote: > > Hello, > > I have a 340 MB avro data file that contains records sorted and > identified > > by unique id (duplicate records exists). At the beginning of every unique > > record a synchronization point is created with DataFileWriter.sync(). (I > > cannot or do not want to save the sync points and i do not want to use > > SortedKeyValueFile as output format for M/R job) > > > > There are at-least 25k synchronization points in a 340 MB file. > > > > Ex: > > Marker1_RecordA1_RecordA2_RecordA3_Marker2_RecordB1_RecordB2 > > > > > > As records are sorted, for efficient retrieval, binary search is > performed > > using the attached code. > > > > Most of the times the search is successful, at times the code throws the > > following exception > > ------ > > org.apache.avro.AvroRuntimeException: java.io.IOException: Invalid sync! > at > > org.apache.avro.file.DataFileStream.hasNext(DataFileStream.java:210 > > ------ > > > > > > > > Questions > > 1) Is it ok to have 25k sycn points for 300 MB file ? Does it cost in > > performance while reading ? > > 2) I note down the position that was used to invoke > fileReader.sync(mid);. > > If i catch AvroRuntimeException, close and open the file and sync(mid) i > do > > not see exception. Why should Avro throw exception before and not later ? > > 3) Is there a limit on number of times sync() is invoked ? > > 4) When sync(position) is invoked, are any 0 >= position <= file.size() > > valid ? If yes why do i see AvroRuntimeException (#2) ? > > > > Regards, > > Deepak > > > -- Deepak
