From 2ae056abf40f9d5532ba9ac4f5b2c43c235ff414 Mon Sep 17 00:00:00 2001 From: Duo Zhang Date: Fri, 12 Jul 2019 22:22:17 +0800 Subject: [PATCH] HBASE-22681 The 'assert highestUnsyncedTxid < entry.getTxid();' in AbstractFWAL.append may fail when using AsyncFSWAL --- .../apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java index 209ace684257..1045d2b7cf5b 100644 --- a/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java +++ b/hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/wal/AsyncFSWAL.java @@ -439,7 +439,11 @@ private void appendAndSync() { newHighestProcessedAppendTxid = entry.getTxid(); iter.remove(); if (appended) { - unackedAppends.addLast(entry); + // This is possible, when we fail to sync, we will add the unackedAppends back to + // toWriteAppends, so here we may get an entry which is already in the unackedAppends. + if (unackedAppends.isEmpty() || unackedAppends.peekLast().getTxid() < entry.getTxid()) { + unackedAppends.addLast(entry); + } if (writer.getLength() - fileLengthAtLastSync >= batchSize) { break; }