[IGNITE-6762] SparseDistributedMatrixExample failed with NPE

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.3
• Fix Version/s: 2.4
• Component/s: examples, ml
• Assignee: Yury Babak
• Reporter: Sergey Kozlov
• Created: 26/Oct/17 12:34
• Updated: 08/Dec/17 11:07
• Resolved: 08/Dec/17 11:07

Description

1. Open ignite-examples project in IDEA
2. Start 3 nodes by ExampleNodeStartup
3. Run SparseDistributedMatrixExample. It throws the exception:

>>> Ignite grid started.
>>> Create new SparseDistributedMatrix inside IgniteThread.
Exception in thread "SparseDistributedMatrixExample-#51" java.lang.NullPointerException
	at org.apache.ignite.ml.math.distributed.CacheUtils.sum(CacheUtils.java:170)
	at org.apache.ignite.ml.math.distributed.CacheUtils.sparseSum(CacheUtils.java:160)
	at org.apache.ignite.ml.math.impls.matrix.SparseDistributedMatrix.sum(SparseDistributedMatrix.java:185)
	at org.apache.ignite.examples.ml.math.matrix.SparseDistributedMatrixExample.lambda$main$1(SparseDistributedMatrixExample.java:58)
	at java.lang.Thread.run(Thread.java:745)
[15:28:44] Ignite node stopped OK [uptime=00:00:04.399]

Issue Links

• links to: GitHub Pull Request #3003
• links to: TC Build