Matthias J. Sax created KAFKA-5355:
--------------------------------------
Summary: Broker returns messages beyond "latest stable offset" to
transactional consumer
Key: KAFKA-5355
URL: https://issues.apache.org/jira/browse/KAFKA-5355
Project: Kafka
Issue Type: Bug
Components: core
Affects Versions: 0.11.0.0
Reporter: Matthias J. Sax
Priority: Blocker
Attachments: test.log
This issue is exposed by the new (not yet committed) Streams EOS integration
test.
Streams has two tasks (ie, two producers with {{pid}} 0 and 2000) both writing
to output topic {{output}} with one partition (replication factor 1).
The test uses an transactional consumer with {{group.id=readCommitted}} to read
the data from {{output}} topic. When it read the data, each producer has
committed 10 records (one producer write messages with {{key=0}} and the other
with {{key=1}}). Furthermore, each producer has an open transaction and 5
uncommitted records written.
The test fails, as we expect to see 10 records per key, but we get 15 for key=1:
{noformat}
java.lang.AssertionError:
Expected: <[KeyValue(1, 0), KeyValue(1, 1), KeyValue(1, 3), KeyValue(1, 6),
KeyValue(1, 10), KeyValue(1, 15), KeyValue(1, 21), KeyValue(1, 28), KeyValue(1,
36), KeyValue(1, 45)]>
but: was <[KeyValue(1, 0), KeyValue(1, 1), KeyValue(1, 3), KeyValue(1, 6),
KeyValue(1, 10), KeyValue(1, 15), KeyValue(1, 21), KeyValue(1, 28), KeyValue(1,
36), KeyValue(1, 45), KeyValue(1, 55), KeyValue(1, 66), KeyValue(1, 78),
KeyValue(1, 91), KeyValue(1, 105)]>
{noformat}
Dumping the segment shows, that there are two commit markers (one for each
producer) for the first 10 messages written. Furthermore, there are 5 pending
records. Thus, "latest stable offset" should be 21 (20 messages plus 2 commit
markers) and not data should be returned beyond this offset.
Dumped Log Segment {{output-0}}
{noformat}
Starting offset: 0
baseOffset: 0 lastOffset: 9 baseSequence: 0 lastSequence: 9 producerId: 0
producerEpoch: 6 partitionLeaderEpoch: 0 isTransactional: true position: 0
CreateTime: 1496255947332 isvalid: true size: 291 magic: 2 compresscodec: NONE
crc: 600535135
baseOffset: 10 lastOffset: 10 baseSequence: -1 lastSequence: -1 producerId: 0
producerEpoch: 6 partitionLeaderEpoch: 0 isTransactional: true position: 291
CreateTime: 1496256005429 isvalid: true size: 78 magic: 2 compresscodec: NONE
crc: 3458060752
baseOffset: 11 lastOffset: 20 baseSequence: 0 lastSequence: 9 producerId: 2000
producerEpoch: 2 partitionLeaderEpoch: 0 isTransactional: true position: 369
CreateTime: 1496255947322 isvalid: true size: 291 magic: 2 compresscodec: NONE
crc: 3392915713
baseOffset: 21 lastOffset: 25 baseSequence: 10 lastSequence: 14 producerId: 0
producerEpoch: 6 partitionLeaderEpoch: 0 isTransactional: true position: 660
CreateTime: 1496255947342 isvalid: true size: 176 magic: 2 compresscodec: NONE
crc: 3513911368
baseOffset: 26 lastOffset: 26 baseSequence: -1 lastSequence: -1 producerId:
2000 producerEpoch: 2 partitionLeaderEpoch: 0 isTransactional: true position:
836 CreateTime: 1496256011784 isvalid: true size: 78 magic: 2 compresscodec:
NONE crc: 1619151485
{noformat}
Dump with {{--deep-iteration}}
{noformat}
Starting offset: 0
offset: 0 position: 0 CreateTime: 1496255947323 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 0
headerKeys: [] key: 1 payload: 0
offset: 1 position: 0 CreateTime: 1496255947324 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 1
headerKeys: [] key: 1 payload: 1
offset: 2 position: 0 CreateTime: 1496255947325 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 2
headerKeys: [] key: 1 payload: 3
offset: 3 position: 0 CreateTime: 1496255947326 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 3
headerKeys: [] key: 1 payload: 6
offset: 4 position: 0 CreateTime: 1496255947327 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 4
headerKeys: [] key: 1 payload: 10
offset: 5 position: 0 CreateTime: 1496255947328 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 5
headerKeys: [] key: 1 payload: 15
offset: 6 position: 0 CreateTime: 1496255947329 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 6
headerKeys: [] key: 1 payload: 21
offset: 7 position: 0 CreateTime: 1496255947330 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 7
headerKeys: [] key: 1 payload: 28
offset: 8 position: 0 CreateTime: 1496255947331 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 8
headerKeys: [] key: 1 payload: 36
offset: 9 position: 0 CreateTime: 1496255947332 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 600535135 sequence: 9
headerKeys: [] key: 1 payload: 45
offset: 10 position: 291 CreateTime: 1496256005429 isvalid: true keysize: 4
valuesize: 6 magic: 2 compresscodec: NONE crc: 3458060752 sequence: -1
headerKeys: [] endTxnMarker: COMMIT coordinatorEpoch: 0
offset: 11 position: 369 CreateTime: 1496255947313 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 0
headerKeys: [] key: 0 payload: 0
offset: 12 position: 369 CreateTime: 1496255947314 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 1
headerKeys: [] key: 0 payload: 1
offset: 13 position: 369 CreateTime: 1496255947315 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 2
headerKeys: [] key: 0 payload: 3
offset: 14 position: 369 CreateTime: 1496255947316 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 3
headerKeys: [] key: 0 payload: 6
offset: 15 position: 369 CreateTime: 1496255947317 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 4
headerKeys: [] key: 0 payload: 10
offset: 16 position: 369 CreateTime: 1496255947318 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 5
headerKeys: [] key: 0 payload: 15
offset: 17 position: 369 CreateTime: 1496255947319 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 6
headerKeys: [] key: 0 payload: 21
offset: 18 position: 369 CreateTime: 1496255947320 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 7
headerKeys: [] key: 0 payload: 28
offset: 19 position: 369 CreateTime: 1496255947321 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 8
headerKeys: [] key: 0 payload: 36
offset: 20 position: 369 CreateTime: 1496255947322 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3392915713 sequence: 9
headerKeys: [] key: 0 payload: 45
offset: 21 position: 660 CreateTime: 1496255947338 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3513911368 sequence: 10
headerKeys: [] key: 1 payload: 55
offset: 22 position: 660 CreateTime: 1496255947339 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3513911368 sequence: 11
headerKeys: [] key: 1 payload: 66
offset: 23 position: 660 CreateTime: 1496255947340 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3513911368 sequence: 12
headerKeys: [] key: 1 payload: 78
offset: 24 position: 660 CreateTime: 1496255947341 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3513911368 sequence: 13
headerKeys: [] key: 1 payload: 91
offset: 25 position: 660 CreateTime: 1496255947342 isvalid: true keysize: 8
valuesize: 8 magic: 2 compresscodec: NONE crc: 3513911368 sequence: 14
headerKeys: [] key: 1 payload: 105
offset: 26 position: 836 CreateTime: 1496256011784 isvalid: true keysize: 4
valuesize: 6 magic: 2 compresscodec: NONE crc: 1619151485 sequence: -1
headerKeys: [] endTxnMarker: COMMIT coordinatorEpoch: 0
{noformat}
The client log shows, that the reading and writing happen concurrently.
{noformat}
[2017-05-31 11:40:11,642] DEBUG Resetting offset for partition outputTopic-0 to
offset 0. (org.apache.kafka.clients.consumer.internals.Fetcher:418)
[2017-05-31 11:40:11,642] DEBUG Added fetch request for partition outputTopic-0
at offset 0 to node 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:793)
[2017-05-31 11:40:11,642] DEBUG Sending fetch for partitions [outputTopic-0] to
broker 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:203)
[2017-05-31 11:40:11,643] DEBUG Added fetch request for partition outputTopic-0
at offset 11 to node 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:793)
[2017-05-31 11:40:11,643] DEBUG Sending fetch for partitions [outputTopic-0] to
broker 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:203)
[2017-05-31 11:40:11,673] DEBUG TransactionalId: appId-1-0_1 -- Sending
transactional request (type=FindCoordinatorRequest, coordinatorKey=appId-1,
coordinatorType=GROUP) (org.apache.kafka.clients.producer.internals.Sender:314)
[2017-05-31 11:40:11,674] DEBUG TransactionalId appId-1-0_1 -- Received
FindCoordinator response with error NONE
(org.apache.kafka.clients.producer.internals.TransactionManager:738)
[2017-05-31 11:40:11,674] DEBUG TransactionalId: appId-1-0_1 -- Sending
transactional request (transactionalId=appId-1-0_1, producerId=2000,
producerEpoch=2, consumerGroupId=appId-1,
offsets={inputTopic-1=CommittedOffset(offset=10, metadata='')})
(org.apache.kafka.clients.producer.internals.Sender:314)
[2017-05-31 11:40:11,717] DEBUG Dest: 127.0.0.1:64267 (id: 0 rack: null) :
producerId: 0, epoch: 6, Assigning sequence for outputTopic-0: 10
(org.apache.kafka.clients.producer.internals.RecordAccumulator:488)
[2017-05-31 11:40:11,717] DEBUG Dest: 127.0.0.1:64273 (id: 2 rack: null) :
producerId: 0, epoch: 6, Assigning sequence for appId-1-store-changelog-0: 10
(org.apache.kafka.clients.producer.internals.RecordAccumulator:488)
[2017-05-31 11:40:11,718] DEBUG Incremented sequence number for topic-partition
appId-1-store-changelog-0 to 15
(org.apache.kafka.clients.producer.internals.Sender:555)
[2017-05-31 11:40:11,718] DEBUG Incremented sequence number for topic-partition
outputTopic-0 to 15 (org.apache.kafka.clients.producer.internals.Sender:555)
[2017-05-31 11:40:11,780] DEBUG TransactionalId appId-1-0_1 -- Received
TxnOffsetCommit response with errors {inputTopic-1=NONE}
(org.apache.kafka.clients.producer.internals.TransactionManager:900)
[2017-05-31 11:40:11,780] DEBUG TransactionalId appId-1-0_1 -- Transition from
state IN_TRANSACTION to COMMITTING_TRANSACTION
(org.apache.kafka.clients.producer.internals.TransactionManager:427)
[2017-05-31 11:40:11,780] DEBUG TransactionalId: appId-1-0_1 -- Sending
transactional request (transactionalId=appId-1-0_1, producerId=2000,
producerEpoch=2, result=COMMIT)
(org.apache.kafka.clients.producer.internals.Sender:314)
[2017-05-31 11:40:11,782] DEBUG TransactionalId appId-1-0_1 -- Received EndTxn
response with error NONE
(org.apache.kafka.clients.producer.internals.TransactionManager:792)
[2017-05-31 11:40:11,782] DEBUG TransactionalId appId-1-0_1 -- Transition from
state COMMITTING_TRANSACTION to READY
(org.apache.kafka.clients.producer.internals.TransactionManager:427)
[2017-05-31 11:40:11,782] DEBUG TransactionalId appId-1-0_1 -- Transition from
state READY to IN_TRANSACTION
(org.apache.kafka.clients.producer.internals.TransactionManager:427)
[2017-05-31 11:40:11,782] DEBUG Initiating connection to node 0 at
127.0.0.1:64267. (org.apache.kafka.clients.NetworkClient:707)
[2017-05-31 11:40:11,782] DEBUG Added fetch request for partition inputTopic-1
at offset 11 to node 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:793)
[2017-05-31 11:40:11,782] DEBUG Sending fetch for partitions [inputTopic-1] to
broker 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:203)
[2017-05-31 11:40:11,783] DEBUG Completed connection to node 0. Ready.
(org.apache.kafka.clients.NetworkClient:672)
[2017-05-31 11:40:11,783] DEBUG TransactionalId: appId-1-0_1 -- Sending
transactional request (transactionalId=appId-1-0_1, producerId=2000,
producerEpoch=2, partitions=[outputTopic-0, appId-1-store-changelog-1])
(org.apache.kafka.clients.producer.internals.Sender:314)
[2017-05-31 11:40:11,784] DEBUG Added fetch request for partition inputTopic-1
at offset 15 to node 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:793)
[2017-05-31 11:40:11,784] DEBUG Sending fetch for partitions [inputTopic-1] to
broker 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:203)
[2017-05-31 11:40:11,784] DEBUG TransactionalId appId-1-0_1 -- Received
AddPartitionsToTxn response with errors {outputTopic-0=CONCURRENT_TRANSACTIONS,
appId-1-store-changelog-1=CONCURRENT_TRANSACTIONS}
(org.apache.kafka.clients.producer.internals.TransactionManager:658)
[2017-05-31 11:40:11,784] DEBUG TransactionalId: appId-1-0_1 -- Sending
transactional request (transactionalId=appId-1-0_1, producerId=2000,
producerEpoch=2, partitions=[outputTopic-0, appId-1-store-changelog-1])
(org.apache.kafka.clients.producer.internals.Sender:314)
[2017-05-31 11:40:11,784] DEBUG Added fetch request for partition outputTopic-0
at offset 27 to node 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:793)
[2017-05-31 11:40:11,785] DEBUG Sending fetch for partitions [outputTopic-0] to
broker 127.0.0.1:64267 (id: 0 rack: null)
(org.apache.kafka.clients.consumer.internals.Fetcher:203)
{noformat}
(full log attached)
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