ctubbsii commented on a change in pull request #1555: Fix idempotency bug in
importtable
URL: https://github.com/apache/accumulo/pull/1555#discussion_r390715190
##########
File path:
server/master/src/main/java/org/apache/accumulo/master/tableOps/MoveExportedFiles.java
##########
@@ -48,21 +55,35 @@
Map<String,String> fileNameMappings =
PopulateMetadataTable.readMappingFile(fs, tableInfo);
- for (String oldFileName : fileNameMappings.keySet()) {
- if (!fs.exists(new Path(tableInfo.exportDir, oldFileName))) {
- throw new AcceptableThriftTableOperationException(tableInfo.tableId,
tableInfo.tableName,
- TableOperation.IMPORT, TableOperationExceptionType.OTHER,
- "File referenced by exported table does not exists " +
oldFileName);
- }
- }
+ FileStatus[] exportedFiles = fs.listStatus(new
Path(tableInfo.exportDir));
+ FileStatus[] importedFiles = fs.listStatus(new
Path(tableInfo.importDir));
+
+ Set<String> importing = Arrays.stream(exportedFiles).map(fstat ->
fstat.getPath().getName())
+ .map(fileNameMappings::get).collect(Collectors.toSet());
- FileStatus[] files = fs.listStatus(new Path(tableInfo.exportDir));
+ Set<String> imported = Arrays.stream(importedFiles).map(fstat ->
fstat.getPath().getName())
+ .collect(Collectors.toSet());
+ log.debug("Files already present in imported (target) directory: {}",
+ StringUtils.join(imported.toArray(), ","));
- for (FileStatus fileStatus : files) {
+ Set<String> missingFiles = Sets.difference(new
HashSet<String>(fileNameMappings.values()),
+ new HashSet<String>(Sets.union(importing, imported)));
+
+ if (!missingFiles.isEmpty())
+ {
Review comment:
That's fine, too. I typically do it locally, since it doesn't take that
long, and it results in fewer round trips to resolve all the issues. Also, we
have limited executors on Travis that we share with the rest of the ASF, so it
can take awhile before it runs in Travis.
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