LI Guobao created SYSTEMML-2382: ----------------------------------- Summary: Concurrent problem about LibMatrixMult Key: SYSTEMML-2382 URL: https://issues.apache.org/jira/browse/SYSTEMML-2382 Project: SystemML Issue Type: Sub-task Reporter: LI Guobao Assignee: LI Guobao
When the worker number is set to 2 and each worker has 2 threads to launch its instruction, in the case of small batchsize, the program fails with a concurrent error. But when I set only 1 thread to each worker, it does not fail. Here is the stack: {code:java} Caused by: org.apache.sysml.runtime.DMLRuntimeException: java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: 3 at org.apache.sysml.runtime.matrix.data.LibMatrixMult.matrixMult(LibMatrixMult.java:221) at org.apache.sysml.runtime.matrix.data.MatrixBlock.aggregateBinaryOperations(MatrixBlock.java:4796) at org.apache.sysml.runtime.instructions.cp.AggregateBinaryCPInstruction.processInstruction(AggregateBinaryCPInstruction.java:73) at org.apache.sysml.runtime.controlprogram.ProgramBlock.executeSingleInstruction(ProgramBlock.java:252) ... 13 more Caused by: java.util.concurrent.ExecutionException: java.lang.ArrayIndexOutOfBoundsException: 3 at java.util.concurrent.FutureTask.report(FutureTask.java:122) at java.util.concurrent.FutureTask.get(FutureTask.java:192) at org.apache.sysml.runtime.matrix.data.LibMatrixMult.matrixMult(LibMatrixMult.java:213) ... 16 more Caused by: java.lang.ArrayIndexOutOfBoundsException: 3 at org.apache.sysml.runtime.matrix.data.LibMatrixMult.matrixMultSparseDenseMMShortLHS(LibMatrixMult.java:1305) at org.apache.sysml.runtime.matrix.data.LibMatrixMult.matrixMultSparseDense(LibMatrixMult.java:1194) at org.apache.sysml.runtime.matrix.data.LibMatrixMult.access$300(LibMatrixMult.java:57) at org.apache.sysml.runtime.matrix.data.LibMatrixMult$MatrixMultTask.call(LibMatrixMult.java:3921) ... 5 more {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)