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From "Tian Hong Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HAWQ-1346) If using WebHdfsFileSystem as default Filesytem, it will cause cast type exception
Date Mon, 20 Feb 2017 07:46:44 GMT
Tian Hong Wang created HAWQ-1346:
------------------------------------

             Summary: If using WebHdfsFileSystem as default Filesytem, it will cause cast
type exception
                 Key: HAWQ-1346
                 URL: https://issues.apache.org/jira/browse/HAWQ-1346
             Project: Apache HAWQ
          Issue Type: Bug
          Components: PXF
            Reporter: Tian Hong Wang
            Assignee: Ed Espino


In incubator-hawq/pxf/pxf-hdfs/src/main/java/org/apache/hawq/pxf/plugins/hdfs/ChunkRecordReader.java:

private DFSInputStream getInputStream() {
      return (DFSInputStream) (fileIn.getWrappedStream());
 }

If using WebHdfsFileSystem as default Filesytem, it will cause cast type exception;

java.lang.ClassCastException: org.apache.hadoop.hdfs.web.WebHdfsFileSystem$WebHdfsInputStream
cannot be cast to org.apache.hadoop.hdfs.DFSInputStream
        at org.apache.hawq.pxf.plugins.hdfs.ChunkRecordReader.getInputStream(ChunkRecordReader.java:76)
        at org.apache.hawq.pxf.plugins.hdfs.ChunkRecordReader.<init>(ChunkRecordReader.java:112)
        at org.apache.hawq.pxf.plugins.hdfs.LineBreakAccessor.getReader(LineBreakAccessor.java:64)
        at org.apache.hawq.pxf.plugins.hdfs.HdfsSplittableDataAccessor.getNextSplit(HdfsSplittableDataAccessor.java:114)
        at org.apache.hawq.pxf.plugins.hdfs.HdfsSplittableDataAccessor.openForRead(HdfsSplittableDataAccessor.java:83)
        at org.apache.hawq.pxf.service.ReadBridge.beginIteration(ReadBridge.java:73)
        at org.apache.hawq.pxf.service.rest.BridgeResource$1.write(BridgeResource.java:132)
        at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:71)
        at com.sun.jersey.core.impl.provider.entity.StreamingOutputProvider.writeTo(StreamingOutputProvider.java:57)
        at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:306)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1437)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)



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