spmd error: Could not deserialize object: java.io.IOException

Lab 1: 
    Warning: Could not deserialize object: java.io.IOException: Cannot deserialize proxy: Ice.ObjectInputStream not found/n
    > In parallel.internal.pool.deserialize (line 9)
  Lab 2: 
    Warning: Could not deserialize object: java.io.IOException: Cannot deserialize proxy: Ice.ObjectInputStream not found/n
    > In parallel.internal.pool.deserialize (line 9)
  Lab 1: 
      In parallel.internal.pool.deserializeFunction (line 12)
      In spmdlang.remoteBlockExecution>iDeserializeInputs (line 169)
      In spmdlang.remoteBlockExecution>iPrelude (line 109)
      In spmdlang.remoteBlockExecution (line 36)
  Lab 2: 
      In parallel.internal.pool.deserializeFunction (line 12)
      In spmdlang.remoteBlockExecution>iDeserializeInputs (line 169)
      In spmdlang.remoteBlockExecution>iPrelude (line 109)
      In spmdlang.remoteBlockExecution (line 36)

[Walter Roberson]

My guess is that you are exceeding the 2 Gigabyte limit on transferring data between workers. (Perhaps the limit is higher these days.)

Answer 1

[Edric Ellis]

The problem here is that you appear to be creating a java object in the MATLAB client process that cannot be transferred to the worker - which is a separate process. It's not clear to me from your code exactly where that is, but what you need to do is simple: you must ensure that these objects are created on the workers. In other words, you must perform whatever setup phase involves the java/Ice API inside an spmd block.

[raym]

It worked !