版本:hive: 0.8.1 hbase:0.92.0 hadoop:1.0.0 java
錯誤信息相似以下: apache
Exception in thread "Thread-169" java.lang.RuntimeException: Error while reading from task log url 瀏覽器
at org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(TaskLogProcessor.java:130) oop
at org.apache.hadoop.hive.ql.exec.JobDebugger.showJobFailDebugInfo(JobDebugger.java:211) ui
at org.apache.hadoop.hive.ql.exec.JobDebugger.run(JobDebugger.java:81) url
at java.lang.Thread.run(Thread.java:662) spa
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: http://slaver1:50060/tasklog?taskid=attempt_201112211741_0005_m_000000_1&start=-8193 .net
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1436) 日誌
at java.net.URL.openStream(URL.java:1010) code
at org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(TaskLogProcessor.java:120)
... 3 more
FAILED: Execution Error, return code 2 from org.apache.hadoop.hive.ql.exec.MapRedTask
解決過程以下:
看錯誤日誌,url是:
http://slaver1:50060/tasklog?taskid=attempt_201112211741_0005_m_000000_1&start=-8193
再看看HADOOP的源碼:TaskLogServlet
String attemptIdStr = request.getParameter("attemptid");
if (attemptIdStr == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST,
"Argument attemptid is required");
return;
}
因此taskid應該是attemptid ,應該是hadoop的版本不一致致使的。
而後在瀏覽器裏訪問:http://slaver1:50060/tasklog?attemptid=attempt_201112211741_0005_m_000000_1&start=-8193
得到真正的錯誤信息,class not found 致使的,而後就好辦了,把對應的jar包扔到hadoop的lib .
stop-mapred.sh
start-mapred.sh
搞定。