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https://issues.apache.org/jira/browse/KUDU-2375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16414874#comment-16414874
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Grant Henke commented on KUDU-2375:
-----------------------------------
[~tlipcon] The error message is coming from 1.6.0 when trying to read metadata
from 1.7.0. I don't think their is a great way to change the behavior/messages
for the old versions. I could create a patch to improve the message or handling
for future versions so that changes similar to the decimal change have more
clear messages on downgrade.
Note: If you don't create decimal tables or you delete them before downgrade
there should be no issues.
> Can't parse message of type "kudu.master.SysTablesEntryPB" because it is
> missing required fields: schema.columns[5].type
> ------------------------------------------------------------------------------------------------------------------------
>
> Key: KUDU-2375
> URL: https://issues.apache.org/jira/browse/KUDU-2375
> Project: Kudu
> Issue Type: Bug
> Components: master
> Affects Versions: 1.7.0
> Reporter: Michael Brown
> Priority: Major
>
> When tables with decimals are added in 1.7.0, a downgrade from 1.7.0 to 1.6
> results in a dcheck when 1.6 starts and Kudu isn't usable in its downgraded
> version.
> {noformat}
> F0324 17:45:10.681808 105716 catalog_manager.cc:935] Loading table and tablet
> metadata into memory failed: Corruption: Failed while visiting tables in sys
> catalog: unable to parse metadata field for row
> 467d365fffbe4485a3249079c48f42a9: Error parsing msg: Can't parse message of
> type "kudu.master.SysTablesEntryPB" because it is missing required fields:
> schema.columns[5].type
> {noformat}
> {noformat}
> #0 0x0000003355e32625 in raise () from /lib64/libc.so.6
> #1 0x0000003355e33e05 in abort () from /lib64/libc.so.6
> #2 0x0000000001cea129 in ?? ()
> #3 0x00000000009268cd in google::LogMessage::Fail() ()
> #4 0x000000000092878d in google::LogMessage::SendToLog() ()
> #5 0x0000000000926409 in google::LogMessage::Flush() ()
> #6 0x000000000092922f in google::LogMessageFatal::~LogMessageFatal() ()
> #7 0x00000000008f05de in ?? ()
> #8 0x00000000008f6039 in
> kudu::master::CatalogManager::PrepareForLeadershipTask() ()
> #9 0x0000000001d297d7 in kudu::ThreadPool::DispatchThread() ()
> #10 0x0000000001d20151 in kudu::Thread::SuperviseThread(void*) ()
> #11 0x0000003356207aa1 in start_thread () from /lib64/libpthread.so.0
> #12 0x0000003355ee893d in clone () from /lib64/libc.so.6
> {noformat}
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