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Posted to issues@hbase.apache.org by "Guanghao Zhang (JIRA)" <ji...@apache.org> on 2016/11/21 09:27:59 UTC
[jira] [Assigned] (HBASE-17140) Throw RegionOfflineException
directly when request for a disabled table
[ https://issues.apache.org/jira/browse/HBASE-17140?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Guanghao Zhang reassigned HBASE-17140:
--------------------------------------
Assignee: Guanghao Zhang
> Throw RegionOfflineException directly when request for a disabled table
> -----------------------------------------------------------------------
>
> Key: HBASE-17140
> URL: https://issues.apache.org/jira/browse/HBASE-17140
> Project: HBase
> Issue Type: Improvement
> Components: Client
> Reporter: Guanghao Zhang
> Assignee: Guanghao Zhang
>
> Now when request for a disabled table, it need 3 rpc calls before fail.
> 1. get region location
> 2. send call to rs and get NotServeRegionException
> 3. retry and check the table state, then throw TableNotEnabledException
> The table state check is added for disabled table. But now the prepare method in RegionServerCallable shows that all retry request will get table state first.
> {code}
> public void prepare(final boolean reload) throws IOException {
> // check table state if this is a retry
> if (reload && !tableName.equals(TableName.META_TABLE_NAME) &&
> getConnection().isTableDisabled(tableName)) {
> throw new TableNotEnabledException(tableName.getNameAsString() + " is disabled.");
> }
> try (RegionLocator regionLocator = connection.getRegionLocator(tableName)) {
> this.location = regionLocator.getRegionLocation(row);
> }
> if (this.location == null) {
> throw new IOException("Failed to find location, tableName=" + tableName +
> ", row=" + Bytes.toString(row) + ", reload=" + reload);
> }
> setStubByServiceName(this.location.getServerName());
> }
> {code}
> An improvement is set the region offline in HRegionInfo. Then throw the RegionOfflineException when get region location.
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