[HADOOP-4530] In fsck, HttpServletResponse sendError fails with IllegalStateException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.18.1
• Fix Version/s: 0.20.0
• Hadoop Flags: Reviewed
• Assignee: Hairong Kuang
• Reporter: Koji Noguchi
• Created: 27/Oct/08 23:58
• Updated: 08/Jul/09 16:43
• Resolved: 05/Nov/08 23:11

Description

When looking at HADOOP-4526, I tried using sendError at line:53.

FsckServlet.java

                                _
     49     } catch (IOException ie) {
     50       StringUtils.stringifyException(ie);
     51       LOG.warn(ie);
     52       String errMsg = "Fsck on path " + pmap.get("path") + " failed.";
     53       response.sendError(HttpServletResponse.SC_GONE, errMsg);
     54       throw ie;
     55     }

However, it always failed with

2008-10-27 22:39:07,359 WARN /: /fsck?path=%2Fuser:
java.lang.IllegalStateException: Committed
  at org.mortbay.jetty.servlet.ServletHttpResponse.resetBuffer(ServletHttpResponse.java:212)
  at org.mortbay.jetty.servlet.ServletHttpResponse.sendError(ServletHttpResponse.java:375)
  at org.apache.hadoop.dfs.FsckServlet.doGet(FsckServlet.java:54)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
  at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
  at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:427)
  at org.mortbay.jetty.servlet.WebApplicationHandler.dispatch(WebApplicationHandler.java:475)
  at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:567)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1565)
  at org.mortbay.jetty.servlet.WebApplicationContext.handle(WebApplicationContext.java:635)
  at org.mortbay.http.HttpContext.handle(HttpContext.java:1517)
  at org.mortbay.http.HttpServer.service(HttpServer.java:954)
  at org.mortbay.http.HttpConnection.service(HttpConnection.java:814)
  at org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:981)
  at org.mortbay.http.HttpConnection.handle(HttpConnection.java:831)
  at org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244)
  at org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
  at org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)

And client wasn't seeing the error.