由网友(相顾无言)分享简介：我有一个映射器和减速机的正常工作，当我在管道版本运行这些：I have a mapper and reducer that work fine when I run them in the piped version:cat data.csv | ./mapper.py | sort -k1,1 | ./reduc...

我有一个映射器和减速机的正常工作，当我在管道版本运行这些：

I have a mapper and reducer that work fine when I run them in the piped version:

cat data.csv | ./mapper.py | sort -k1,1 | ./reducer.py

我用弹性均线preducer向导，加载输入，输出，引导等的引导是成功的，但我仍然得到一个错误的执行。

I used the elastic mapreducer wizard, loaded inputs, outputs, bootstrap, etc. The bootstrap is successful, but I am still getting an error in execution.

这是我收到我的标准错误的步骤1中的错误...

This is the error I'm getting in my stderr for step 1...

+ /etc/init.d/hadoop-state-pusher-control stop
+ PID_FILE=/mnt/var/run/hadoop-state-pusher/hadoop-state-pusher.pid
+ LOG_FILE=/mnt/var/log/hadoop-state-pusher/hadoop-state-pusher.out
+ SVC_FILE=/mnt/var/lib/hadoop-state-pusher/run-hadoop-state-pusher
+ case $1 in
+ stop
+ echo 0
/etc/init.d/hadoop-state-pusher-control: line 35: /mnt/var/lib/hadoop-state-pusher/run-hadoop-state-pusher: No such file or directory
+ /etc/init.d/hadoop-state-pusher-control start
+ PID_FILE=/mnt/var/run/hadoop-state-pusher/hadoop-state-pusher.pid
+ LOG_FILE=/mnt/var/log/hadoop-state-pusher/hadoop-state-pusher.out
+ SVC_FILE=/mnt/var/lib/hadoop-state-pusher/run-hadoop-state-pusher
+ case $1 in
+ start
++ dirname /mnt/var/lib/hadoop-state-pusher/run-hadoop-state-pusher
+ sudo -u hadoop mkdir -p /mnt/var/lib/hadoop-state-pusher
+ echo 1
++ dirname /mnt/var/run/hadoop-state-pusher/hadoop-state-pusher.pid
+ sudo -u hadoop mkdir -p /mnt/var/run/hadoop-state-pusher
++ dirname /mnt/var/log/hadoop-state-pusher/hadoop-state-pusher.out
+ sudo -u hadoop mkdir -p /mnt/var/log/hadoop-state-pusher
+ disown %1
+ sleep 5
+ sudo -u hadoop /usr/bin/hadoop-state-pusher -server --pidfile /mnt/var/run/hadoop-state-pusher/hadoop-state-pusher.pid
+ exit 0
Command exiting with ret '0'

这是神秘的。这究竟是什么意思？

This is cryptic. What on earth does this mean?

这似乎也与安装的东西出了问题？其中其他日志文件可能会说一些内容丰富，我应该在哪里寻找？

It seems to have a problem with mounting something? Which of the other log files might say something informative, where I should be looking?

我想一个解决方案，我发现此处，在刚刚制作实例较大，但这并没有工作，同样的错误消息。

I tried a solution I found here, in just making the instance bigger, but this did not work, same error message.

推荐答案

我一直在寻找在错误日志文件中。有一个不同的（有像6？），其实给了我一些有用的蟒蛇调试信息。原来，我用了一个字符串interpolation.format（这种{}的，不是这种以数字{1}。瓦尔（A，B））这是不支持在Python＆LT; 2.7，这是什么默认安装在弹性马preduce使用的EC2映像上。

I was looking in the wrong log file. There is a different (there were like 6?) that actually gave me some useful python debugging information. It turned out I had used a string interpolation.format("of this kind {}, not this kind with a digit {1}".vars(a,b)) that was unsupported in python < 2.7, which was what was installed by default on the EC2 image used in elastic mapreduce.