 class="externalLink">Exception</a></pre>
<div class="block">Do data partitioning</div>
<dl>
<dt><span class="overrideSpecifyLabel">Specified by:</span></dt>
<dd><code>call</code>&nbsp;in interface&nbsp;<code>org.apache.spark.api.java.function.PairFlatMapFunction&lt;scala.Tuple2&lt;<a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/Long.html?is-external=true" title="class or interface in java.lang" class="externalLink">Long</a>,&#8203;scala.Tuple2&lt;<a href="../../../matrix/dat