sankarh 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_r262367285
##########
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) {
+ Path dbLevelPath = dbDir.getPath();
+ String dbNameInDump = dbLevelPath.getName();
+
+ List<String> tableNames = new ArrayList<>();
+ RemoteIterator<LocatedFileStatus> filesIterator =
fs.listFiles(dbLevelPath, true);
+ while (filesIterator.hasNext()) {
+ Path nextFile = filesIterator.next().getPath();
+ String filePath = nextFile.toString();
+ if (filePath.endsWith(EximUtil.METADATA_NAME)) {
+ // Remove dbLevelPath from the current path to check if this
_metadata file is under DB or
+ // table level directory.
+ String replacedString = filePath.replace(dbLevelPath.toString(), "");
+ if (!replacedString.equalsIgnoreCase(EximUtil.METADATA_NAME)) {
+ tableNames.add(nextFile.getParent().getName());
Review comment:
Btw, I also thinks, we won't change the format of this dump directory as it
will break backward compatibility if customer uses different versions for
source and target cluster. But still, worth to keep it common code. Pls open a
ticket for this.
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