Raghav Aggarwal created HIVE-28026: -------------------------------------- Summary: Reading proto data more than 2GB from multiple splits fails Key: HIVE-28026 URL: https://issues.apache.org/jira/browse/HIVE-28026 Project: Hive Issue Type: Bug Affects Versions: 4.0.0-beta-1 Environment: Reporter: Raghav Aggarwal Assignee: Raghav Aggarwal
{*}Query{*}: select * from _<table_name>_ {*}Explanation{*}: On running the above mentioned query on a hive proto table, multiple tez containers will be spawned to process the data. In a container, if there are multiple hdfs splits and the combined size of decompressed data is more than 2GB then the query fails with the following error: {code:java} "While parsing a protocol message, the input ended unexpectedly in the middle of a field. This could mean either that the input has been truncated or that an embedded message misreported its own length." {code} This is happening because of _[CodedInputStream|https://github.com/protocolbuffers/protobuf/blob/54489e95e01882407f356f83c9074415e561db00/java/core/src/main/java/com/google/protobuf/CodedInputStream.java#L2712C7-L2712C16] i.e. byteLimit += totalBytesRetired + pos;_ _byteLimit_ is __ getting InterOverflow as _totalBytesRetired_ is retaining all the bytes that it has read as CodedInputStream is initiliazed once for a container [https://github.com/apache/hive/blob/564d7e54d2360488611da39d0e5f027a2d574fc1/ql/src/java/org/apache/tez/dag/history/logging/proto/ProtoMessageWritable.java#L96] . This is different from issue reproduced in [https://github.com/zabetak/protobuf-large-message] as there it is a single proto data file more than 2GB, but in my case, there are multiple file total resulting in 2GB. *Limitation:* This fix will still not resolve the issue which is mentioned [https://github.com/protocolbuffers/protobuf/issues/11729] -- This message was sent by Atlassian Jira (v8.20.10#820010)