[HADOOP-13216] Append SequenceFile with compressionType(NONE,RECORD,BLOCK) throws NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Duplicate
• Affects Version/s: 2.7.2
• Component/s: fs
• Assignee: Unassigned
• Reporter: Syed Akram
• Created: 30/May/16 14:06
• Updated: 31/May/16 10:15
• Resolved: 31/May/16 10:15

Description

while Appending sequenceFile with any Compression Type (NONE, RECORD, BLOCK), getting writer

SequenceFile.createWriter(conf,
SequenceFile.Writer.file(path),
SequenceFile.Writer.compression(ctype),
SequenceFile.Writer.keyClass(Key.class),
SequenceFile.Writer.valueClass(value..class),
SequenceFile.Writer.appendIfExists(true),
);
Above throws the below exception when we try to append existing sequencefile with some compression technique,
java.lang.NullPointerException
at org.apache.hadoop.io.SequenceFile$Writer.<init>(SequenceFile.java:1118)
at org.apache.hadoop.io.SequenceFile.createWriter(SequenceFile.java:273)
at SequenceFileTest.getWriter(SequenceFileTest.java:342)
at SequenceFileTest.writeContent(SequenceFileTest.java:429)
at SequenceFileTest.<init>(SequenceFileTest.java:83)
at SequenceFileTest.main(SequenceFileTest.java:565)

If i use below writer
SequenceFile.createWriter(conf,
SequenceFile.Writer.file(path),
SequenceFile.Writer.keyClass(keyClass),
SequenceFile.Writer.valueClass(keyClass),
SequenceFile.Writer.appendIfExists(append)
);
without any compressiontype, then it works fine.

Issue Links

• is duplicated by: HADOOP-13138 Unable to append to a SequenceFile with Compression.NONE.