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https://issues.apache.org/jira/browse/ORC-1873?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17942356#comment-17942356
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dzcxzl commented on ORC-1873:
-----------------------------
org.apache.orc.impl.TreeReaderFactory.BytesColumnVectorUtil#readOrcByteArrays
[https://github.com/apache/orc/blob/main/java/core/src/java/org/apache/orc/impl/TreeReaderFactory.java#L2086-L2089]
OR use flatten api
{code:java}
BytesColumnVector value = (BytesColumnVector) batch.cols[0];
value.flatten(false, batch.selected, batch.size); {code}
> I'm writing repeated string values to a string column in an ORC file using
> Java and while reading the ORC file back, encounter a NullPointerException
> -----------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: ORC-1873
> URL: https://issues.apache.org/jira/browse/ORC-1873
> Project: ORC
> Issue Type: Bug
> Reporter: Shiva
> Priority: Major
> Attachments: ORCReader.java, ORCWriter.java
>
>
> When writing the same value to a specific column for every row within a
> stripe, only the first row correctly returns the expected value. All
> subsequent rows in that stripe return {{null}} for the same column.
> However, if two or more distinct values are written to the column within the
> same stripe, this issue does not occur — all values are returned as expected.
>
> Attached Reader and Writer code files.
>
> When I am trying to read all the rows, facing below issue
> {code:java}
> Row 1 value: value
> Exception in thread "main" java.lang.NullPointerException: Cannot read the
> array length because "bytes" is null
> at java.base/java.lang.String.<init>(String.java:1455)
> at com.ge.ORCReader.main(ORCReader.java:38){code}
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