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HDFS-16127. Improper pipeline close recovery causes a permanent write failure or data loss. Contributed by Kihwal Lee. 

(cherry picked from commit 47002719f2)
This commit is contained in:
Kihwal Lee 2021-07-16 14:23:36 -05:00
parent 14a3e74c5c
commit 95a70c0fdf
1 changed files with 13 additions and 1 deletions
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12
hadoop-hdfs-project/hadoop-hdfs-client/src/main/java/org/apache/hadoop/hdfs/DataStreamer.java
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@ -778,7 +778,19 @@ class DataStreamer extends Daemon {
// Is this block full?
if (one.isLastPacketInBlock()) {
// wait for the close packet has been acked
try {
waitForAllAcks();
} catch (IOException ioe) {
// No need to do a close recovery if the last packet was acked.
// i.e. ackQueue is empty. waitForAllAcks() can get an exception
// (e.g. connection reset) while sending a heartbeat packet,
// if the DN sends the final ack and closes the connection.
synchronized (dataQueue) {
if (!ackQueue.isEmpty()) {
throw ioe;
}
}
}
if (shouldStop()) {
continue;
}