chained exception

[Ted Yu]

Hi,
I was looking at some exception and wonder how the stack for cause can be configured to print full stack trace.

Cheers

Caused by: java.io.IOException: stream closed. size=33. verifyChecksum=false; pread=true
        at org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader.readAtOffset(HFileBlock.java:1228)
2013-11-05 18:18:19,611 DEBUG [Thread-776] regionserver.TestAtomicOperation$2(332): flushing
        at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockDataInternal(HFileBlock.java:1497)
        at org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockData(HFileBlock.java:1328)
        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:360)
        at org.apache.hadoop.hbase.io.hfile.HFileReaderV2$ScannerV2.seekTo(HFileReaderV2.java:776)2013-11-05 18:18:19,611 DEBUG [Thread-776] regionserver.HRegion(1491): Started memstore flush for testRowMutationMultiThreads,,1383675493878.8a74acdf823d71250de8c9268a47065b., current region memstore size 4.9 K

        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:234)
        at org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:149)
        ... 9 more