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chlorine-hadoop's Issues

Implement incemental Scans

Enable an option to specify incremental scans
Record the current time stamp in an hdfs location so that further scans happen from that timstamp only.

checksum error

hi,

I am trying to run your program however, getting following error. would you please help me understand what is going on.
I am using HDP docker image version HDP 2.6.1

2017-09-22 10:19:47,008 INFO  [main] hadoop.DeepScanPipeline (DeepScanPipeline.java:run(82)) - Hostname = 21290
2017-09-22 10:19:47,031 WARN  [main] fs.FSInputChecker (ChecksumFileSystem.java:<init>(165)) - Problem opening checksum file: file:/root/sensitive_out/_temp/attempt_local1444930170_0001_m_000000_0.  Ignoring exception: 
java.io.EOFException
	at java.io.DataInputStream.readFully(DataInputStream.java:197)
	at java.io.DataInputStream.readFully(DataInputStream.java:169)
	at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.<init>(ChecksumFileSystem.java:155)
	at org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:348)
	at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:786)
	at org.apache.hadoop.fs.FileUtil.copyMerge(FileUtil.java:401)
	at io.dataapps.chlorine.hadoop.DeepScanPipeline.run(DeepScanPipeline.java:91)
	at io.dataapps.chlorine.hadoop.Scan.main(Scan.java:160)
2017-09-22 10:19:47,043 INFO  [main] fs.FSInputChecker (FSInputChecker.java:readChecksumChunk(285)) - Found checksum error: b[3072, 3072]=
org.apache.hadoop.fs.ChecksumException: Checksum error: file:/root/sensitive_out/_temp/attempt_local1444930170_0001_m_000001_0 at 523264
	at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.readChunk(ChecksumFileSystem.java:261)
	at org.apache.hadoop.fs.FSInputChecker.readChecksumChunk(FSInputChecker.java:276)
	at org.apache.hadoop.fs.FSInputChecker.read1(FSInputChecker.java:228)
	at org.apache.hadoop.fs.FSInputChecker.read(FSInputChecker.java:196)
	at java.io.DataInputStream.read(DataInputStream.java:100)
	at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:93)
	at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:61)
	at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:121)
	at org.apache.hadoop.fs.FileUtil.copyMerge(FileUtil.java:403)
	at io.dataapps.chlorine.hadoop.DeepScanPipeline.run(DeepScanPipeline.java:91)
	at io.dataapps.chlorine.hadoop.Scan.main(Scan.java:160)
2017-09-22 10:19:47,046 ERROR [main] hadoop.DeepScanPipeline (DeepScanPipeline.java:run(102)) - org.apache.hadoop.fs.ChecksumException: Checksum error: file:/root/sensitive_out/_temp/attempt_local1444930170_0001_m_000001_0 at 523264

Enable Fast Scans

Enable a feature which accepts a parameter --fast which takes samples of inputs from the dataset and performs quick scans

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