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Fix: Throw IllegalArgumentException for null IDs/Src/Dst in toGraphX (Fixes #765) #766

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Merged
SemyonSinchenko merged 6 commits into from
Jan 3, 2026
Merged

Fix: Throw IllegalArgumentException for null IDs/Src/Dst in toGraphX (Fixes #765) #766

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2b7b6df
Fix: Throw IllegalArgumentException for null IDs/Src/Dst in toGraphX …
Jan 2, 2026
34ad466
Fix scalafmt formatting
Jan 3, 2026
244aaf8
scalafix failure
Jan 3, 2026
3f4d0b5
Fix for Fallback case not catching nullables
Jan 3, 2026
75b8938
Missed GraphFrame.scala from last commit
Jan 3, 2026
8b0549d
Review Comment
Jan 3, 2026
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Fix: Throw IllegalArgumentException for null IDs/Src/Dst in toGraphX … 
…(for #765)
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jeganvg
jeganvg committed Jan 2, 2026
commit 2b7b6dfb11c2fb4492bead033de1bc6eb00628b5
2 changes: 2 additions & 0 deletions core/src/main/scala/org/graphframes/GraphFrame.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -209,13 +209,15 @@ class GraphFrame private (
if (hasIntegralIdType) {
val vv = vertices.select(col(ID).cast(LongType), nestAsCol(vertices, ATTR)).rdd.map {
case Row(id: Long, attr: Row) => (id, attr)
case Row(null, _) => throw new IllegalArgumentException(s"Vertex ID cannot be null. Found null in column '$ID'.")
case _ => throw new GraphFramesUnreachableException()
}
val ee = edges
.select(col(SRC).cast(LongType), col(DST).cast(LongType), nestAsCol(edges, ATTR))
.rdd
.map {
case Row(srcId: Long, dstId: Long, attr: Row) => Edge(srcId, dstId, attr)
case Row(null, _, _) | Row(_, null, _) => throw new IllegalArgumentException(s"Edge '$SRC' and '$DST' cannot be null.")
case _ => throw new GraphFramesUnreachableException()
}
Graph[Row, Row](vv, ee)
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41 changes: 41 additions & 0 deletions core/src/test/scala/org/graphframes/GraphFrameSuite.scala
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Expand Up @@ -610,6 +610,47 @@ class GraphFrameSuite extends SparkFunSuite with GraphFrameTestSparkContext {
assert(edges(3).getLong(1) === 2L)
}

test("toGraphX should throw IllegalArgumentException for null IDs") {
import org.apache.spark.sql.functions._
// Creating vertices with a null ID
val vertices = spark.createDataFrame(Seq(
(1L, "a"),
(null.asInstanceOf[java.lang.Long], "b")
)).toDF("id", "attr")

val edges = spark.createDataFrame(Seq(
(1L, 1L, "friend")
)).toDF("src", "dst", "relationship")

val g = GraphFrame(vertices, edges)

// GraphFramesUnreachableException will be thrown as per issue #765
// IllegalArgumentException expected with the fix
val e = intercept[IllegalArgumentException] {
g.toGraphX
}

assert(e.getMessage.contains("Vertex ID cannot be null"))
}

test("toGraphX should throw IllegalArgumentException for null Edge Src/Dst") {
val vertices = spark.createDataFrame(Seq((1L, "a"))).toDF("id", "attr")

// Edge with a NULL destination
val edges = spark.createDataFrame(Seq(
(1L, null.asInstanceOf[java.lang.Long], "friend")
)).toDF("src", "dst", "relationship")

val g = GraphFrame(vertices, edges)

val e = intercept[IllegalArgumentException] {
g.toGraphX
}

assert(e.getMessage.contains("Edge"))
assert(e.getMessage.contains("cannot be null."))
}

test("convert directed graph with edge attributes to undirected") {
val v = spark.createDataFrame(Seq((1L, "a"), (2L, "b"))).toDF("id", "name")
val e = spark.createDataFrame(Seq((1L, 2L, "edge1"))).toDF("src", "dst", "attr")
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