Wei-Chiu Chuang created HDFS-13524:
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Summary: Occasional "All datanodes are bad" error in
TestLargeBlock#testLargeBlockSize
Key: HDFS-13524
URL: https://issues.apache.org/jira/browse/HDFS-13524
Project: Hadoop HDFS
Issue Type: Bug
Environment: TestLargeBlock#testLargeBlockSize may fail with error:
{quote}
All datanodes
[DatanodeInfoWithStorage[127.0.0.1:44968,DS-acddd79e-cdf1-4ac5-aac5-e804a2e61600,DISK]]
are bad. Aborting...
{quote}
Tracing back, the error is due to the stress applied to the host sending a 2GB
block, causing write pipeline ack read timeout:
{quote}
2017-09-10 22:16:07,285 [DataXceiver for client
DFSClient_NONMAPREDUCE_998779779_9 at /127.0.0.1:57794 [Receiving block
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001]] INFO
datanode.DataNode (DataXceiver.java:writeBlock(742)) - Receiving
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001 src:
/127.0.0.1:57794 dest: /127.0.0.1:44968
2017-09-10 22:16:50,402 [DataXceiver for client
DFSClient_NONMAPREDUCE_998779779_9 at /127.0.0.1:57794 [Receiving block
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001]] WARN
datanode.DataNode (BlockReceiver.java:flushOrSync(434)) - Slow flushOrSync took
5383ms (threshold=300ms), isSync:false, flushTotalNanos=5383638982ns,
volume=file:/tmp/tmp.1oS3ZfDCwq/src/hadoop/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data1/
2017-09-10 22:17:54,427 [ResponseProcessor for block
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001] WARN
hdfs.DataStreamer (DataStreamer.java:run(1214)) - Exception for
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001
java.net.SocketTimeoutException: 65000 millis timeout while waiting for channel
to be ready for read. ch : java.nio.channels.SocketChannel[connected
local=/127.0.0.1:57794 remote=/127.0.0.1:44968]
at
org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
at
org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161)
at
org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131)
at
org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:118)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at java.io.FilterInputStream.read(FilterInputStream.java:83)
at
org.apache.hadoop.hdfs.protocolPB.PBHelperClient.vintPrefixed(PBHelperClient.java:434)
at
org.apache.hadoop.hdfs.protocol.datatransfer.PipelineAck.readFields(PipelineAck.java:213)
at
org.apache.hadoop.hdfs.DataStreamer$ResponseProcessor.run(DataStreamer.java:1104)
2017-09-10 22:17:54,432 [DataXceiver for client
DFSClient_NONMAPREDUCE_998779779_9 at /127.0.0.1:57794 [Receiving block
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001]] INFO
datanode.DataNode (BlockReceiver.java:receiveBlock(1000)) - Exception for
BP-682118952-172.26.15.143-1505106964162:blk_1073741825_1001
java.io.IOException: Connection reset by peer
{quote}
Instead of raising read timeout, I suggest increasing cluster size from
default=1 to 3, so that it has the opportunity to choose a different DN and
resend.
Suspect this fails after HDFS-13103, in Hadoop 2.8/3.0.0-alpha1 when we
introduced client acknowledgement read timeout.
Reporter: Wei-Chiu Chuang
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