Tim Armstrong created IMPALA-8236:
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Summary: Adding new TUnit values to runtime profile is broken
Key: IMPALA-8236
URL: https://issues.apache.org/jira/browse/IMPALA-8236
Project: IMPALA
Issue Type: Bug
Components: Backend
Reporter: Tim Armstrong
See IMPALA-8235 for context.
The problem this tracks is that there's no way to add a new value to the TUnit
enum, which is required in TCounter, without breaking existing readers (at
least Java readers), which will fail to decode TCounter values with an enum
value they don't recognise.
The workaround is to only use the following units in anything that is
serialised into a TCounter:
{noformat}
UNIT,
UNIT_PER_SECOND,
CPU_TICKS,
BYTES
BYTES_PER_SECOND,
TIME_NS,
DOUBLE_VALUE
{noformat}
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