Liu Shaohui created HBASE-12542:
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Summary: Delete a family of table online will crash regionserver
Key: HBASE-12542
URL: https://issues.apache.org/jira/browse/HBASE-12542
Project: HBase
Issue Type: Bug
Components: regionserver
Reporter: Liu Shaohui
Assignee: Liu Shaohui
Priority: Critical
Fix For: 2.0.0, 0.94.25
Using alter command to delete a family of table online will make the
regionsevers that serve the regions of the table crash.
{code}
alter 't', NAME => 'f', METHOD => 'delete'
{code}
The reason is that TableDeleteFamilyHandler in HMaster delete the family dir
firstly and then reopen all the regions of table.
When the regionserver reopen the region, it will crash for the exception in
flushing memstore to hfile of the deleted family during closing the region,
because the parent dir of the hfile has been deleted in
TableDeleteFamilyHandler.
See: TableDeleteFamilyHandler.java #57
A simple solution is change the order of operations in TableDeleteFamilyHandler.
- update table descriptor first,
- reopen all the regions,
- delete the the family dir at last.
Suggestions are welcomed.
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