smallzhongfeng commented on issue #198:
URL:
https://github.com/apache/incubator-uniffle/issues/198#issuecomment-1237782101
```
22/09/05 20:58:01 INFO impl.HdfsShuffleReadHandler: Read index files
hdfs://ns1/tmp/4/308-308/xxxx-19999_0.index for 2 ms
22/09/05 20:58:01 WARN util.RssUtils: Read index data under flow
java.nio.BufferUnderflowException
at java.nio.Buffer.nextGetIndex(Buffer.java:506)
at java.nio.HeapByteBuffer.getLong(HeapByteBuffer.java:412)
at
org.apache.uniffle.common.util.RssUtils.transIndexDataToSegments(RssUtils.java:204)
at
org.apache.uniffle.common.util.RssUtils.transIndexDataToSegments(RssUtils.java:188)
at
org.apache.uniffle.storage.handler.impl.DataSkippableReadHandler.readShuffleData(DataSkippableReadHandler.java:67)
at
org.apache.uniffle.storage.handler.impl.HdfsClientReadHandler.readShuffleData(HdfsClientReadHandler.java:135)
at
org.apache.uniffle.storage.handler.impl.ComposedClientReadHandler.readShuffleData(ComposedClientReadHandler.java:112)
at
org.apache.uniffle.storage.handler.impl.ComposedClientReadHandler.readShuffleData(ComposedClientReadHandler.java:140)
at
org.apache.uniffle.client.impl.ShuffleReadClientImpl.read(ShuffleReadClientImpl.java:195)
at
org.apache.uniffle.client.impl.ShuffleReadClientImpl.readShuffleBlockData(ShuffleReadClientImpl.java:131)
at
org.apache.spark.shuffle.reader.RssShuffleDataIterator.hasNext(RssShuffleDataIterator.java:100)
at
org.apache.spark.shuffle.reader.RssShuffleReader$MultiPartitionIterator.hasNext(RssShuffleReader.java:213)
at
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:409)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage9.sort_addToSorter_0$(Unknown
Source)
at
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage9.processNext(Unknown
Source)
```
We seem to have the same problem, but the reason for the inconsistent blocks
number is that an exception occurred when the index file was read.
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