Ted Yu created HADOOP-12724: ------------------------------- Summary: Let BufferedFSInputStream implement CanUnbuffer Key: HADOOP-12724 URL: https://issues.apache.org/jira/browse/HADOOP-12724 Project: Hadoop Common Issue Type: Improvement Reporter: Ted Yu
When trying to determine reason for test failure over in HBASE-9393, I saw the following exception: {code} testSeekTo[4](org.apache.hadoop.hbase.io.hfile.TestSeekTo) Time elapsed: 0.033 sec <<< ERROR! java.lang.UnsupportedOperationException: this stream does not support unbuffering. at org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:229) at org.apache.hadoop.fs.FSDataInputStream.unbuffer(FSDataInputStream.java:227) at org.apache.hadoop.hbase.io.hfile.HFile.pickReaderVersion(HFile.java:518) at org.apache.hadoop.hbase.io.hfile.HFile.createReader(HFile.java:562) at org.apache.hadoop.hbase.io.hfile.TestSeekTo.testSeekToInternals(TestSeekTo.java:307) at org.apache.hadoop.hbase.io.hfile.TestSeekTo.testSeekTo(TestSeekTo.java:298) {code} Here is the cause: {code} java.lang.ClassCastException: org.apache.hadoop.fs.BufferedFSInputStream cannot be cast to org.apache.hadoop.fs.CanUnbuffer {code} See the comments starting with https://issues.apache.org/jira/browse/HBASE-9393?focusedCommentId=15105939&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15105939 for background on the HBase patch. This issue is to make BufferedFSInputStream implement CanUnbuffer. Thanks to [~cmccabe] for discussion. -- This message was sent by Atlassian JIRA (v6.3.4#6332)