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https://issues.apache.org/jira/browse/HBASE-8192?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13613408#comment-13613408
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Chenghao Jiang commented on HBASE-8192:
---------------------------------------
When store == null, it's not necessary to add it to failures, since "No such
column family" is not recoverable.
On the other hand, if there is an IOException in ioes, it should be dealt with
first (before dealing with failures), since any IOException in ioes means
unrecoverable.
> wrong logic in HRegion.bulkLoadHFiles(List)
> -------------------------------------------
>
> Key: HBASE-8192
> URL: https://issues.apache.org/jira/browse/HBASE-8192
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.94.1, 0.94.2, 0.94.3, 0.94.4, 0.94.5
> Reporter: Chenghao Jiang
>
> the wrong logic is here:
> when a ColumnFamily does not exist, it gets a null store object, then
> ioes.add(ioe); failures.add(p)
> but the code below, if (failures.size() != 0), it prints a warn log and
> return false, so it will never go into the code if (ioes.size() != 0) below,
> and IOException will not be thrown, then the client will keep retry forever.
> there is the same situation when doing store.assertBulkLoadHFileOk, if any
> WrongRegionException is caught and failures.add(p), then all the other
> IOException thrown by assertBulkLoadHFileOk will be ignored.
> so i think if (failures.size() != 0) {} should be dealt with after if
> (ioes.size() !=0) {}
> {code}
> for (Pair<byte[], String> p : familyPaths) {
> byte[] familyName = p.getFirst();
> String path = p.getSecond();
> Store store = getStore(familyName);
> if (store == null) {
> IOException ioe = new DoNotRetryIOException(
> "No such column family " + Bytes.toStringBinary(familyName));
> ioes.add(ioe);
> failures.add(p);
> } else {
> try {
> store.assertBulkLoadHFileOk(new Path(path));
> } catch (WrongRegionException wre) {
> // recoverable (file doesn't fit in region)
> failures.add(p);
> } catch (IOException ioe) {
> // unrecoverable (hdfs problem)
> ioes.add(ioe);
> }
> }
> }
> // validation failed, bail out before doing anything permanent.
> if (failures.size() != 0) {
> StringBuilder list = new StringBuilder();
> for (Pair<byte[], String> p : failures) {
> list.append("\n").append(Bytes.toString(p.getFirst())).append(" : ")
> .append(p.getSecond());
> }
> // problem when validating
> LOG.warn("There was a recoverable bulk load failure likely due to a" +
> " split. These (family, HFile) pairs were not loaded: " + list);
> return false;
> }
> // validation failed because of some sort of IO problem.
> if (ioes.size() != 0) {
> LOG.error("There were IO errors when checking if bulk load is ok. " +
> "throwing exception!");
> throw MultipleIOException.createIOException(ioes);
> }
> {code}
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