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作者 | 正文 |
发表时间:2012-03-20
版本:hive: 0.8.1 hbase:0.92.0 hadoop:1.0.0 错误信息类似如下:
Exception in thread "Thread-169" java.lang.RuntimeException: Error while reading from task log url at org.apache.hadoop.hive.ql.exec.errors.TaskLogProcessor.getErrors(TaskLogProcessor.java:130) at org.apache.hadoop.hive.ql.exec.JobDebugger.showJobFailDebugInfo(JobDebugger.java:211) at org.apache.hadoop.hive.ql.exec.JobDebugger.run(JobDebugger.java:81) at java.lang.Thread.run(Thread.java:662) 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 at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1436) at java.net.URL.openStream(URL.java:1010) 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
解决过程如下:
看错误日志,url是:
http://slaver1:50060/tasklog?taskid=attempt_201112211741_0005_m_000000_1&start=-8193
再看看HADOOP的源码:TaskLogServlet
String attemptIdStr = request.getParameter("attemptid");
if (attemptIdStr == null) {
response.sendError(HttpServletResponse.SC_BAD_REQUEST, "Argument attemptid is required"); return; } 所以taskid应该是attemptid ,应该是hadoop的版本不一致导致的。
然后在浏览器里访问:http://slaver1:50060/attemptid?taskid=attempt_201112211741_0005_m_000000_1&start=-8193
获得真正的错误信息,class not found 导致的,然后就好办了,把对应的jar包扔到hadoop的lib . stop-mapred.sh start-mapred.sh 搞定。
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