this.tableLock.acquire();
boolean success = false;
try {
String tableName = this.hTableDescriptor.getNameAsString();
if (MetaReader.tableExists(catalogTracker, tableName)) {
throw new TableExistsException(tableName);
}
// If we have multiple client threads trying to create the table at the
// same time, given the async nature of the operation, the table
// could be in a state where .META. table hasn't been updated yet in
// the process() function.
// Use enabling state to tell if there is already a request for the same
// table in progress. This will introduce a new zookeeper call. Given
// createTable isn't a frequent operation, that should be ok.
//TODO: now that we have table locks, re-evaluate above
try {
if (!this.assignmentManager.getZKTable().checkAndSetEnablingTable(tableName)) {
throw new TableExistsException(tableName);
}
} catch (KeeperException e) {
throw new IOException("Unable to ensure that the table will be" +
" enabling because of a ZooKeeper issue", e);
}