yuqi1129 commented on code in PR #2873:
URL: https://github.com/apache/gravitino/pull/2873#discussion_r1974879819
##########
core/src/main/java/org/apache/gravitino/catalog/SchemaOperationDispatcher.java:
##########
@@ -201,68 +213,73 @@ public Schema loadSchema(NameIdentifier ident) throws
NoSuchSchemaException {
@Override
public Schema alterSchema(NameIdentifier ident, SchemaChange... changes)
throws NoSuchSchemaException {
- validateAlterProperties(ident,
HasPropertyMetadata::schemaPropertiesMetadata, changes);
NameIdentifier catalogIdent = getCatalogIdentifier(ident);
- Schema alteredSchema =
- doWithCatalog(
- catalogIdent,
- c -> c.doWithSchemaOps(s -> s.alterSchema(ident, changes)),
- NoSuchSchemaException.class);
-
- // If the Schema is maintained by the Gravitino's store, we don't have to
alter again.
- boolean isManagedSchema = isManagedEntity(catalogIdent,
Capability.Scope.SCHEMA);
- if (isManagedSchema) {
- return EntityCombinedSchema.of(alteredSchema)
- .withHiddenProperties(
- getHiddenPropertyNames(
+ return TreeLockUtils.doWithTreeLock(
+ NameIdentifier.of(ident.namespace().levels()),
Review Comment:
The following scenario will cause problems if we use write lock in the
schema level，assuming the schema name is `schema1`
```
TheadA ThreadB
hold schema1 write lock
rename schema1 to schema2
store schema2 to storage hold schema2 write lock
block due to some reason rename schema2 to schema1
return store schema2 to
storage
return
```
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