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Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
courses:mapreduce-tutorial:step-24 [2012/01/27 22:08] straka |
courses:mapreduce-tutorial:step-24 [2012/01/27 22:16] straka |
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* The filename //must// be the same as the name of the class -- this is enforced by Java compiler. | * The filename //must// be the same as the name of the class -- this is enforced by Java compiler. | ||
* In one class multiple jobs can be submitted, either in sequence or in parallel. | * In one class multiple jobs can be submitted, either in sequence or in parallel. | ||
- | * A mismatch of types is usually detected by the compiler, but sometimes it is detected only at runtime. If that happens, an exception is raised and the program crashes. | + | * A mismatch of types is usually detected by the compiler, but sometimes it is detected only at runtime. If that happens, an exception is raised and the program crashes. For example, default key output class it '' |
===== Running the job ===== | ===== Running the job ===== | ||
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===== Exercise ===== | ===== Exercise ===== | ||
Download the '' | Download the '' | ||
- | / | + | / |
+ | |||
+ | Mind the '' | ||
+ | * When using '' | ||
+ | * When not specifying '' |