somandal commented on code in PR #8953: URL: https://github.com/apache/pinot/pull/8953#discussion_r909089594
########## pinot-segment-local/src/main/java/org/apache/pinot/segment/local/segment/creator/impl/fwd/MultiValueFixedByteRawIndexCreator.java: ########## @@ -77,7 +77,8 @@ public MultiValueFixedByteRawIndexCreator(File baseIndexDir, ChunkCompressionTyp boolean deriveNumDocsPerChunk, int writerVersion) throws IOException { File file = new File(baseIndexDir, column + Indexes.RAW_MV_FORWARD_INDEX_FILE_EXTENSION); - int totalMaxLength = maxNumberOfMultiValueElements * valueType.getStoredType().size(); + // Store the length followed by the values + int totalMaxLength = Integer.BYTES + (maxNumberOfMultiValueElements * valueType.getStoredType().size()); Review Comment: I don't think this code path was tested correctly (especially on the read path for non-integer types). I only ran into issues (I believe it was a buffer overflow) when I tried LONG and DOUBLE type columns. Then spent time understanding what the code does and realized that the size is missing. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org