Optimize log information when DFSInputStream meet CannotObtainBlockLengthException

Caused by: java.io.IOException: Cannot obtain block length for LocatedBlock{BP-***:blk_***_***; getBlockSize()=690504; corrupt=false; offset=1811939328; locs=[DatanodeInfoWithStorage[*:50010,DS-2bcadcc4-458a-45c6-a91b-8461bf7cdd71,DISK], DatanodeInfoWithStorage[*:50010,DS-8f2bb259-ecb2-4839-8769-4a0523360d58,DISK], DatanodeInfoWithStorage[*:50010,DS-69f4de6f-2428-42ff-9486-98c2544b1ada,DISK]]}
	at org.apache.hadoop.hdfs.DFSInputStream.readBlockLength(DFSInputStream.java:402)
	at org.apache.hadoop.hdfs.DFSInputStream.fetchLocatedBlocksAndGetLastBlockLength(DFSInputStream.java:345)
	at org.apache.hadoop.hdfs.DFSInputStream.openInfo(DFSInputStream.java:280)
	at org.apache.hadoop.hdfs.DFSInputStream.<init>(DFSInputStream.java:272)
	at org.apache.hadoop.hdfs.DFSClient.open(DFSClient.java:1664)
	at org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:304)
	at org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:300)
	at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
	at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:300)
	at org.apache.hadoop.fs.FilterFileSystem.open(FilterFileSystem.java:161)
	at org.apache.hadoop.fs.viewfs.ChRootedFileSystem.open(ChRootedFileSystem.java:266)
	at org.apache.hadoop.fs.viewfs.ViewFileSystem.open(ViewFileSystem.java:481)
	at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:828)
	at org.apache.hadoop.mapred.LineRecordReader.<init>(LineRecordReader.java:109)
	at org.apache.hadoop.mapred.TextInputFormat.getRecordReader(TextInputFormat.java:67)
	at org.apache.hadoop.hive.ql.io.CombineHiveRecordReader.<init>(CombineHiveRecordReader.java:65)
	... 16 more