ashutosh-bapat commented on a change in pull request #551: HIVE-21286: Hive
should support clean-up of previously bootstrapped tables when retry from
different dump.
URL: https://github.com/apache/hive/pull/551#discussion_r262138331
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/exec/repl/ReplLoadTask.java
##########
@@ -279,6 +292,72 @@ a database ( directory )
return 0;
}
+ /**
+ * Cleanup/drop tables from the given database which are bootstrapped by
input dump dir.
+ * @throws HiveException Failed to drop the tables.
+ * @throws IOException File operations failure.
+ * @throws InvalidInputException Invalid input dump directory.
+ */
+ private void bootstrapRollbackTask() throws HiveException, IOException,
InvalidInputException {
+ Path bootstrapDirectory = new PathBuilder(work.bootstrapDumpToRollback)
+ .addDescendant(ReplUtils.INC_BOOTSTRAP_ROOT_DIR_NAME).build();
+ FileSystem fs = bootstrapDirectory.getFileSystem(conf);
+
+ if (!fs.exists(bootstrapDirectory)) {
+ throw new InvalidInputException("Input bootstrap dump directory to
rollback doesn't exist: "
+ + bootstrapDirectory);
+ }
+
+ FileStatus[] fileStatuses = fs.listStatus(bootstrapDirectory,
EximUtil.getDirectoryFilter(fs));
+ if ((fileStatuses == null) || (fileStatuses.length == 0)) {
+ throw new InvalidInputException("Input bootstrap dump directory to
rollback is empty: "
+ + bootstrapDirectory);
+ }
+
+ if (StringUtils.isNotBlank(work.dbNameToLoadIn) && (fileStatuses.length >
1)) {
+ throw new InvalidInputException("Multiple DB dirs in the dump: " +
bootstrapDirectory
+ + " is not allowed to load to single target DB: " +
work.dbNameToLoadIn);
+ }
+
+ for (FileStatus dbDir : fileStatuses) {
Review comment:
Given the above two conditions there's going to be exactly one entry in the
fileStatuses array. Why do we need a for loop here? We could just get that one
entry into dbDir and write rest of the code without a loop?
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
us...@infra.apache.org
With regards,
Apache Git Services
