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https://issues.apache.org/jira/browse/PHOENIX-7025?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17764901#comment-17764901
]
ASF GitHub Bot commented on PHOENIX-7025:
-----------------------------------------
palashc commented on code in PR #1666:
URL: https://github.com/apache/phoenix/pull/1666#discussion_r1325139235
##########
phoenix-core/src/main/java/org/apache/phoenix/jdbc/PhoenixStatement.java:
##########
@@ -317,16 +331,83 @@ protected QueryPlan optimizeQuery(CompilableStatement
stmt) throws SQLException
protected PhoenixResultSet executeQuery(final CompilableStatement stmt,
final QueryLogger queryLogger)
throws SQLException {
- return executeQuery(stmt, true, queryLogger, false);
+ return executeQuery(stmt, true, queryLogger, false,
this.ddlTimestampValidationEnabled);
}
protected PhoenixResultSet executeQuery(final CompilableStatement stmt,
final QueryLogger queryLogger, boolean noCommit)
throws SQLException {
- return executeQuery(stmt, true, queryLogger, noCommit);
+ return executeQuery(stmt, true, queryLogger, noCommit,
this.ddlTimestampValidationEnabled);
+ }
+
+ /**
+ * Build a request for the validateLastDDLTimestamp RPC.
+ * @param tableRef
+ * @return
+ */
+ private RegionServerEndpointProtos.ValidateLastDDLTimestampRequest
getValidateDDLTimestampRequest(TableRef tableRef) {
+ RegionServerEndpointProtos.ValidateLastDDLTimestampRequest.Builder
requestBuilder
+ =
RegionServerEndpointProtos.ValidateLastDDLTimestampRequest.newBuilder();
+ RegionServerEndpointProtos.LastDDLTimestampRequest.Builder innerBuilder
+ =
RegionServerEndpointProtos.LastDDLTimestampRequest.newBuilder();
+
+ byte[] tenantIDBytes = this.connection.getTenantId() == null ?
HConstants.EMPTY_BYTE_ARRAY : this.connection.getTenantId().getBytes();
+ byte[] schemaBytes = tableRef.getTable().getSchemaName() == null ?
HConstants.EMPTY_BYTE_ARRAY : tableRef.getTable().getSchemaName().getBytes();
+
+ innerBuilder.setTenantId(ByteStringer.wrap(tenantIDBytes));
+ innerBuilder.setSchemaName(ByteStringer.wrap(schemaBytes));
+
innerBuilder.setTableName(ByteStringer.wrap(tableRef.getTable().getTableName().getBytes()));
+
innerBuilder.setLastDDLTimestamp(tableRef.getTable().getLastDDLTimestamp());
+ requestBuilder.addLastDDLTimestampRequests(innerBuilder);
+ return requestBuilder.build();
+ }
+
+ /**
+ * Verifies that table metadata in client cache is up-to-date with server.
+ * A random live region server is picked for invoking the RPC to validate
LastDDLTimestamp.
+ * Retry once if there was an error performing the RPC, otherwise throw
the Exception.
+ * @param tableRef
+ * @throws SQLException
+ */
+ private void validateDDLTimestamp(TableRef tableRef, boolean doRetry)
throws SQLException {
+
+ try (Admin admin = this.connection.getQueryServices().getAdmin()) {
+ // get all live region servers
+ List<ServerName> regionServers = new
ArrayList<>(admin.getRegionServers(true));
+ // pick one at random
+ ServerName regionServer =
regionServers.get(ThreadLocalRandom.current().nextInt(regionServers.size()));
+
+ LOGGER.debug("Sending DDL timestamp validation request for table
{} at regionserver {}",
Review Comment:
`tableRef.getTable().getName()` returns the full name if I am not wrong. I
can break it down to `tableRef.getTable().getTableName()` and
`tableRef.getTable().getSchemaName()` to avoid any confusion.
> Create a new RPC to validate last ddl timestamp for read requests.
> ------------------------------------------------------------------
>
> Key: PHOENIX-7025
> URL: https://issues.apache.org/jira/browse/PHOENIX-7025
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Rushabh Shah
> Assignee: Palash Chauhan
> Priority: Major
>
> Introduce a new RPC request from phoenix client to any region server via
> PhoenixRegionServerEndpoint#validateLastDDLTimestamp. Since the last ddl
> timestamp cache is maintained by all the regionservers, you can choose any
> regionserver randomly. In future, we can make this rpc more resilient by
> sending this rpc to multiple regionservers simultaneously.
> If phoenix client throws StaleMetadataCacheException then invalidate the
> cache on the client side and retry executeQuery method while fetching the
> updated metadata from SYSCAT regionserver.
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