sandeepvinayak commented on a change in pull request #3376:
URL: https://github.com/apache/hbase/pull/3376#discussion_r649431795
##########
File path:
hbase-server/src/main/java/org/apache/hadoop/hbase/replication/regionserver/ReplicationSourceWALReader.java
##########
@@ -122,65 +122,51 @@ public ReplicationSourceWALReader(FileSystem fs,
Configuration conf,
@Override
public void run() {
int sleepMultiplier = 1;
- WALEntryBatch batch = null;
- WALEntryStream entryStream = null;
- try {
- // we only loop back here if something fatal happened to our stream
- while (isReaderRunning()) {
- try {
- entryStream =
- new WALEntryStream(logQueue, conf, currentPosition,
source.getWALFileLengthProvider(),
- source.getServerWALsBelongTo(), source.getSourceMetrics(),
walGroupId);
- while (isReaderRunning()) { // loop here to keep reusing stream
while we can
- if (!source.isPeerEnabled()) {
- Threads.sleep(sleepForRetries);
- continue;
- }
- if (!checkQuota()) {
- continue;
- }
-
- batch = createBatch(entryStream);
- batch = readWALEntries(entryStream, batch);
+ while (isReaderRunning()) { // we only loop back here if something fatal
happened to our stream
+ WALEntryBatch batch = null;
+ try (WALEntryStream entryStream =
+ new WALEntryStream(logQueue, conf, currentPosition,
+ source.getWALFileLengthProvider(),
source.getServerWALsBelongTo(),
+ source.getSourceMetrics(), walGroupId)) {
+ while (isReaderRunning()) { // loop here to keep reusing stream while
we can
+ batch = null;
+ if (!source.isPeerEnabled()) {
+ Threads.sleep(sleepForRetries);
+ continue;
+ }
+ if (!checkQuota()) {
+ continue;
+ }
+ batch = tryAdvanceStreamAndCreateWALBatch(entryStream);
+ if (batch == null) {
+ // got no entries and didn't advance position in WAL
+ handleEmptyWALEntryBatch();
+ entryStream.reset(); // reuse stream
+ continue;
+ }
+ // if we have already switched a file, skip reading and put it
directly to the ship queue
+ if (!batch.isEndOfFile()) {
+ readWALEntries(entryStream, batch);
currentPosition = entryStream.getPosition();
- if (batch == null) {
- // either the queue have no WAL to read
- // or got no new entries (didn't advance position in WAL)
- handleEmptyWALEntryBatch();
- entryStream.reset(); // reuse stream
- } else {
- addBatchToShippingQueue(batch);
- }
}
- } catch (WALEntryFilterRetryableException | IOException e) { // stream
related
- if (handleEofException(e, batch)) {
- sleepMultiplier = 1;
- } else {
- LOG.warn("Failed to read stream of replication entries "
- + "or replication filter is recovering", e);
- if (sleepMultiplier < maxRetriesMultiplier) {
- sleepMultiplier++;
- }
- Threads.sleep(sleepForRetries * sleepMultiplier);
+ // need to propagate the batch even it has no entries since it may
carry the last
+ // sequence id information for serial replication.
+ LOG.debug("Read {} WAL entries eligible for replication",
batch.getNbEntries());
+ entryBatchQueue.put(batch);
+ sleepMultiplier = 1;
+ }
+ } catch (IOException e) { // stream related
+ if (!handleEofException(e, batch)) {
Review comment:
I think we need to reset the sleepMultiplier to 1 in the else part of
this.
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