xushiyan commented on code in PR #10099:
URL: https://github.com/apache/hudi/pull/10099#discussion_r1398155186
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hudi-sync/hudi-hive-sync/src/main/java/org/apache/hudi/hive/HiveSyncTool.java:
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@@ -103,15 +103,38 @@ public class HiveSyncTool extends HoodieSyncTool
implements AutoCloseable {
public HiveSyncTool(Properties props, Configuration hadoopConf) {
super(props, hadoopConf);
- String metastoreUris = props.getProperty(METASTORE_URIS.key());
+ /*String metastoreUris = props.getProperty(METASTORE_URIS.key());
// Give precedence to HiveConf.ConfVars.METASTOREURIS if it is set.
// Else if user has provided HiveSyncConfigHolder.METASTORE_URIS, then set
that in hadoop conf.
if (isNullOrEmpty(hadoopConf.get(HiveConf.ConfVars.METASTOREURIS.varname))
&& nonEmpty(metastoreUris)) {
LOG.info(String.format("Setting %s = %s",
HiveConf.ConfVars.METASTOREURIS.varname, metastoreUris));
hadoopConf.set(HiveConf.ConfVars.METASTOREURIS.varname, metastoreUris);
}
- HiveSyncConfig config = new HiveSyncConfig(props, hadoopConf);
- this.config = config;
+ HiveSyncConfig config = new HiveSyncConfig(props, hadoopConf);*/
+
+ String configuredMetastoreUris = props.getProperty(METASTORE_URIS.key());
+ String existingHadoopConfMetastoreUris =
hadoopConf.get(HiveConf.ConfVars.METASTOREURIS.varname);
+
+ final Configuration hadoopConfForSync; // the configuration to use for
this instance of the sync tool
+ if (nonEmpty(configuredMetastoreUris)) {
+ // if the metastore uris from the provided hadoop configuration exist
and are equal to the user provided URIs, then we can use the provided
configuration
+ if (configuredMetastoreUris.equals(existingHadoopConfMetastoreUris)) {
+ hadoopConfForSync = hadoopConf;
+ } else if (isNullOrEmpty(existingHadoopConfMetastoreUris)) {
+ // if there is no value already set in the provided configuration,
update the existing configuration to avoid making copies of the configuration
per instance of this tool
+ hadoopConf.set(HiveConf.ConfVars.METASTOREURIS.varname,
configuredMetastoreUris);
+ hadoopConfForSync = hadoopConf;
+ } else {
+ // if the metastore uris exist in the provided hadoop configuration
but differ from the user provided URIs, then we need to create a new
configuration with the value set
+ hadoopConfForSync = new Configuration(hadoopConf);
+ hadoopConfForSync.set(HiveConf.ConfVars.METASTOREURIS.varname,
configuredMetastoreUris);
+ }
+ } else {
+ // if the user did not provide any URIs, then we can use the provided
configuration
+ hadoopConfForSync = hadoopConf;
Review Comment:
> the user provides multiple targets by creating a copy of the configuration
when there is a value already present in the hadoop configuration
i'm not very clear about what this means exactly. can you elaborate a bit
pls?
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