hadoop超时解决办法

进行矩阵计算的时候，由于持续时间长，往往会出现超时的错误，错误内容如下：

Task attempt_201005281116_119912_r_000823_0 failed to report status for 606 seconds. Killing!
10/06/10 10:49:45 INFO mapred.JobClient: Task Id : attempt_201005281116_119912_r_000015_1, Status : FAILED

解决办法是在代码中定时report

        final TaskAttemptContext context = 
   
    ;
        long lastTime = System.currentTimeMillis();

        public void ping() {
            final long currtime = System.currentTimeMillis();
            
    if (currtime - lastTime > 10000) {
                context.progress();
                lastTime = currtime;
            }
        }