org.apache.hadoop.hive.ql.exec.errors.ErrorHeuristic Maven / Gradle / Ivy
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* to you under the Apache License, Version 2.0 (the
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* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
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*/
package org.apache.hadoop.hive.ql.exec.errors;
import org.apache.hadoop.mapred.JobConf;
/**
* Classes implementing ErrorHeuristic are able to generate a possible cause and
* solution for Hive jobs that have failed by examining the query, task log
* files, and the job configuration.
*
* A class implementing ErrorHeuristic should only detect one type of error.
*
*/
public interface ErrorHeuristic {
/**
* Initialize this error heuristic. Must be called before any other methods
* are called
* @param query
* @param jobConf
*/
void init(String query, JobConf jobConf);
/**
* Process the given log line. It should be called for every line in the task
* log file, in sequence.
*
* @param line
*/
void processLogLine(String line);
/**
* Examine the hive query, job configuration, and the lines from the task log
* seen so far though processLogLine() and generate a possible cause/solution.
* Once this method is called, the implementing class should be reset to the
* state before any processLogLine() calls were made.
*
* @return a matching error, or null if a suitable match wasn't found.
*
*/
ErrorAndSolution getErrorAndSolution();
}