Craig Muchinsky created GIRAPH-884:
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Summary: ByteArrayEdges.iterator() throws NPE when no edges are
present
Key: GIRAPH-884
URL: https://issues.apache.org/jira/browse/GIRAPH-884
Project: Giraph
Issue Type: Bug
Reporter: Craig Muchinsky
Attachments: GIRAPH-884.patch
The ByteArrayEdges.iterator() method throws the following NPE when no edges are
present:
2014-03-31 14:44:46,273 ERROR org.apache.giraph.utils.LogStacktraceCallable:
Execution of callable failed
java.lang.NullPointerException
at java.io.ByteArrayInputStream.<init>(ByteArrayInputStream.java:120)
at
org.apache.giraph.utils.ExtendedByteArrayDataInput.<init>(ExtendedByteArrayDataInput.java:50)
at
org.apache.giraph.conf.ImmutableClassesGiraphConfiguration.createExtendedDataInput(ImmutableClassesGiraphConfiguration.java:1009)
at
org.apache.giraph.edge.ByteArrayEdges$ByteArrayEdgeIterator.<init>(ByteArrayEdges.java:141)
at
org.apache.giraph.edge.ByteArrayEdges$ByteArrayEdgeIterator.<init>(ByteArrayEdges.java:138)
at
org.apache.giraph.edge.ByteArrayEdges.iterator(ByteArrayEdges.java:167)
Simply checking the edgeCount before constructing a new ByteArrayEdgeIterator
solves the problem.
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