nastra commented on code in PR #9852:
URL: https://github.com/apache/iceberg/pull/9852#discussion_r1528265184
##########
hive-metastore/src/main/java/org/apache/iceberg/hive/HiveOperationsBase.java:
##########
@@ -181,4 +279,230 @@ default Table newHmsTable(String hmsTableOwner) {
return newTable;
}
+
+ @SuppressWarnings("checkstyle:CyclomaticComplexity")
+ default void commitWithLocking(
+ Configuration conf,
+ BaseMetadata base,
+ BaseMetadata metadata,
+ String baseMetadataLocation,
+ String newMetadataLocation,
+ FileIO io) {
+ boolean newTable = base == null;
+ boolean hiveEngineEnabled = hiveEngineEnabled(conf, metadata);
+ boolean keepHiveStats = conf.getBoolean(ConfigProperties.KEEP_HIVE_STATS,
false);
+
+ BaseMetastoreOperations.CommitStatus commitStatus =
+ BaseMetastoreOperations.CommitStatus.FAILURE;
+ boolean updateHiveTable = false;
+ HiveLock lock = lockObject(metadata, conf, catalogName());
+ try {
+ lock.lock();
+ Table tbl = loadHmsTable();
+
+ if (tbl != null) {
+ String tableType = tbl.getTableType();
+ if (!tableType.equalsIgnoreCase(tableType().name())) {
+ throw new AlreadyExistsException(
+ "%s with same name already exists: %s.%s",
+ tableType.equalsIgnoreCase(TableType.VIRTUAL_VIEW.name()) ?
"View" : "Table",
+ tbl.getDbName(),
+ tbl.getTableName());
+ }
+
+ // If we try to create the table but the metadata location is already
set, then we had a
+ // concurrent commit
+ if (newTable
+ &&
tbl.getParameters().get(BaseMetastoreTableOperations.METADATA_LOCATION_PROP)
+ != null) {
+ throw new AlreadyExistsException(
+ "%s already exists: %s.%s", entityType(), database(), table());
+ }
+
+ updateHiveTable = true;
+ LOG.debug("Committing existing {}: {}", entityType().toLowerCase(),
fullName());
+ } else {
+ tbl =
+ newHmsTable(
+ metadata
+ .properties()
+ .getOrDefault(HiveCatalog.HMS_TABLE_OWNER,
HiveHadoopUtil.currentUser()));
+ LOG.debug("Committing new {}: {}", entityType().toLowerCase(),
fullName());
+ }
+
+ tbl.setSd(storageDescriptor(metadata, hiveEngineEnabled)); // set to
pickup any schema changes
+
+ String metadataLocation =
+
tbl.getParameters().get(BaseMetastoreTableOperations.METADATA_LOCATION_PROP);
+
+ if (!Objects.equals(baseMetadataLocation, metadataLocation)) {
+ throw new CommitFailedException(
+ "Cannot commit: Base metadata location '%s' is not same as the
current %s metadata location '%s' for %s.%s",
+ baseMetadataLocation,
+ entityType().toLowerCase(),
+ metadataLocation,
+ database(),
+ table());
+ }
+
+ setHmsParameters(
+ metadata,
+ tbl,
+ newMetadataLocation,
+ obsoleteProps(conf, base, metadata),
+ hiveEngineEnabled);
+
+ if (!keepHiveStats) {
+ tbl.getParameters().remove(StatsSetupConst.COLUMN_STATS_ACCURATE);
+ }
+
+ lock.ensureActive();
+
+ try {
+ persistTable(
+ tbl, updateHiveTable, hiveLockEnabled(conf, metadata) ? null :
baseMetadataLocation);
+ lock.ensureActive();
+
+ commitStatus = BaseMetastoreOperations.CommitStatus.SUCCESS;
+ } catch (LockException le) {
+ commitStatus = BaseMetastoreOperations.CommitStatus.UNKNOWN;
+ throw new CommitStateUnknownException(
+ "Failed to heartbeat for hive lock while "
+ + "committing changes. This can lead to a concurrent commit
attempt be able to overwrite this commit. "
+ + "Please check the commit history. If you are running into
this issue, try reducing "
+ + "iceberg.hive.lock-heartbeat-interval-ms.",
+ le);
+ } catch (org.apache.hadoop.hive.metastore.api.AlreadyExistsException e) {
+ throw new AlreadyExistsException(
+ "%s already exists: %s.%s", entityType(), tbl.getDbName(),
tbl.getTableName());
+ } catch (InvalidObjectException e) {
+ throw new ValidationException(e, "Invalid Hive object for %s.%s",
database(), table());
+ } catch (CommitFailedException | CommitStateUnknownException e) {
+ throw e;
+ } catch (Throwable e) {
+ if (e.getMessage()
+ .contains(
+ "The table has been modified. The parameter value for key '"
+ + BaseMetastoreTableOperations.METADATA_LOCATION_PROP
+ + "' is")) {
+ throw new CommitFailedException(
+ e, "The table %s.%s has been modified concurrently", database(),
table());
+ }
+
+ if (e.getMessage() != null
+ && e.getMessage().contains("Table/View 'HIVE_LOCKS' does not
exist")) {
+ throw new RuntimeException(
+ "Failed to acquire locks from metastore because the underlying
metastore "
+ + "table 'HIVE_LOCKS' does not exist. This can occur when
using an embedded metastore which does not "
+ + "support transactions. To fix this use an alternative
metastore.",
+ e);
+ }
+
+ LOG.error(
+ "Cannot tell if commit to {}.{} succeeded, attempting to reconnect
and check.",
+ database(),
+ table(),
+ e);
+ commitStatus = validateNewLocationAndReturnCommitStatus(metadata,
newMetadataLocation);
+
+ switch (commitStatus) {
+ case SUCCESS:
+ break;
+ case FAILURE:
+ throw e;
+ case UNKNOWN:
+ throw new CommitStateUnknownException(e);
+ }
+ }
+ } catch (TException e) {
+ throw new RuntimeException(
+ String.format("Metastore operation failed for %s.%s", database(),
table()), e);
+
+ } catch (InterruptedException e) {
+ Thread.currentThread().interrupt();
+ throw new RuntimeException("Interrupted during commit", e);
+
+ } catch (LockException e) {
+ throw new CommitFailedException(e);
+ } finally {
+ cleanupMetadataAndUnlock(lock, io, commitStatus, newMetadataLocation);
+ }
+ }
+
+ default String fullName() {
+ return catalogName() + "." + database() + "." + table();
+ }
+
+ default StorageDescriptor storageDescriptor(BaseMetadata metadata, boolean
hiveEngineEnabled) {
+ return HiveOperationsBase.storageDescriptor(
+ metadata.schema(), metadata.location(), hiveEngineEnabled);
+ }
+
+ default Set<String> obsoleteProps(Configuration conf, BaseMetadata base,
BaseMetadata metadata) {
+ Set<String> obsoleteProps = Sets.newHashSet();
+ if (base != null) {
+ obsoleteProps =
+ base.properties().keySet().stream()
+ .filter(key -> !metadata.properties().containsKey(key))
+ .collect(Collectors.toSet());
+ }
+
+ if (!conf.getBoolean(ConfigProperties.KEEP_HIVE_STATS, false)) {
+ obsoleteProps.add(StatsSetupConst.COLUMN_STATS_ACCURATE);
+ }
+
+ return obsoleteProps;
+ }
+
+ /**
+ * Returns if the hive engine related values should be enabled on the table,
or not.
+ *
+ * <p>The decision is made like this:
+ *
+ * <ol>
+ * <li>Table property value {@link TableProperties#ENGINE_HIVE_ENABLED}
+ * <li>If the table property is not set then check the hive-site.xml
property value {@link
+ * ConfigProperties#ENGINE_HIVE_ENABLED}
+ * <li>If none of the above is enabled then use the default value {@link
+ * TableProperties#ENGINE_HIVE_ENABLED_DEFAULT}
+ * </ol>
+ *
+ * @param metadata Table metadata to use
+ * @return if the hive engine related values should be enabled or not
+ */
+ default boolean hiveEngineEnabled(Configuration conf, BaseMetadata metadata)
{
+ if (metadata.properties().get(TableProperties.ENGINE_HIVE_ENABLED) !=
null) {
+ // We know that the property is set, so default value will not be used,
+ return metadata.propertyAsBoolean(TableProperties.ENGINE_HIVE_ENABLED,
false);
+ }
+
+ return conf.getBoolean(
+ ConfigProperties.ENGINE_HIVE_ENABLED,
TableProperties.ENGINE_HIVE_ENABLED_DEFAULT);
+ }
+
+ /**
+ * Returns if the hive locking should be enabled on the table, or not.
+ *
+ * <p>The decision is made like this:
+ *
+ * <ol>
+ * <li>Table property value {@link TableProperties#HIVE_LOCK_ENABLED}
+ * <li>If the table property is not set then check the hive-site.xml
property value {@link
+ * ConfigProperties#LOCK_HIVE_ENABLED}
+ * <li>If none of the above is enabled then use the default value {@link
+ * TableProperties#HIVE_LOCK_ENABLED_DEFAULT}
+ * </ol>
+ *
+ * @param metadata Table metadata to use
+ * @return if the hive engine related values should be enabled or not
+ */
+ default boolean hiveLockEnabled(Configuration conf, BaseMetadata metadata) {
+ if (metadata.properties().get(TableProperties.HIVE_LOCK_ENABLED) != null) {
Review Comment:
@nk1506 I understand that `engine.hive.lock.enabed` will be available for
views. My point is that there's no reason to check `if
(metadata.properties().get(TableProperties.HIVE_LOCK_ENABLED) != null)` on a
view, because a view won't have `TableProperties.HIVE_LOCK_ENABLED` set in its
properties
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