Hi,
We've got a pretty simple topology running with Storm 0.9.5 (tried also
with 0.9.4 and 0.9.6-INCUBATING) in a 3 machine cluster:
kafkaSpout (3) -----> processBolt (12)
Some info:
- kafkaSpout reads from a topic with 3 partitions and 2 replications
- processBolt iterates throught the message and saves the results in MongoDB
- processBolt is implemented in Python and has a storm.log("I'm doing
something") just to add a simple debug message in the logs
- The messages can be quite big (~25-40 MB) and are in JSON format
- The kafka topic has a retention of 2 hours
- We use the same ZooKeeper cluster to both Kafka and Storm
The topology gets frozen after several hours (not days) running. We don't
see any message in the logs... In fact, the periodic message from
s.k.KafkaUtils and s.k.ZkCoordinator disapears. As you can imagine, the
message from the Bolt also dissapears. Logs are copy/pasted further on. If
we redeploy the topology everything starts to work again until it becomes
frozen again.
Our kafkaSpout config is:
ZkHosts zkHosts = new ZkHosts("zkhost01:2181,zkhost02:2181,zkhost03:2181");
SpoutConfig kafkaConfig = new SpoutConfig(zkHosts, "topic",
"/topic/ourclientid", "ourclientid");
kafkaConfig.scheme = new SchemeAsMultiScheme(new StringScheme());
kafkaConfig.fetchSizeBytes = 50*1024*1024;
kafkaConfig.bufferSizeBytes = 50*1024*1024;
We've also tried setting the following options
kafkaConfig.forceFromStart = true;
kafkaConfig.startOffsetTime = kafka.api.OffsetRequest.EarliestTime(); //
Also with kafka.api.OffsetRequest.LatestTime();
kafkaConfig.useStartOffsetTimeIfOffsetOutOfRange = true;
Right now the topology is running without acking the messages since there's
a bug in kafkaSpout with failed messages and deleted offsets in Kafka.
This is what can be seen in the logs in one of the workers:
2015-07-23T12:37:38.008+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:37:39.079+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:37:51.013+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:37:51.091+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:38:02.684+0200 s.k.ZkCoordinator [INFO] Task [2/3] Refreshing
partition manager connections
2015-07-23T12:38:02.687+0200 s.k.DynamicBrokersReader [INFO] Read partition
info from zookeeper:
GlobalPartitionInformation{partitionMap={0=kafka1:9092, 1=kafka2:9092,
2=kafka3:9092}}
2015-07-23T12:38:02.687+0200 s.k.KafkaUtils [INFO] Task [2/3] assigned
[Partition{host=kafka2, partition=1}]
2015-07-23T12:38:02.687+0200 s.k.ZkCoordinator [INFO] Task [2/3] Deleted
partition managers: []
2015-07-23T12:38:02.687+0200 s.k.ZkCoordinator [INFO] Task [2/3] New
partition managers: []
2015-07-23T12:38:02.687+0200 s.k.ZkCoordinator [INFO] Task [2/3] Finished
refreshing
2015-07-23T12:38:09.012+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:38:41.878+0200 b.s.t.ShellBolt [INFO] ShellLog pid:28364,
name:processBolt I'm doing something
2015-07-23T12:39:02.688+0200 s.k.ZkCoordinator [INFO] Task [2/3] Refreshing
partition manager connections
2015-07-23T12:39:02.691+0200 s.k.DynamicBrokersReader [INFO] Read partition
info from zookeeper:
GlobalPartitionInformation{partitionMap={0=kafka1:9092, 1=kafka2:9092,
2=kafka3:9092}}
2015-07-23T12:39:02.691+0200 s.k.KafkaUtils [INFO] Task [2/3] assigned
[Partition{host=kafka2:9092, partition=1}]
2015-07-23T12:39:02.691+0200 s.k.ZkCoordinator [INFO] Task [2/3] Deleted
partition managers: []
2015-07-23T12:39:02.691+0200 s.k.ZkCoordinator [INFO] Task [2/3] New
partition managers: []
2015-07-23T12:39:02.691+0200 s.k.ZkCoordinator [INFO] Task [2/3] Finished
refreshing
2015-07-23T12:40:02.692+0200 s.k.ZkCoordinator [INFO] Task [2/3] Refreshing
partition manager connections
2015-07-23T12:40:02.695+0200 s.k.DynamicBrokersReader [INFO] Read partition
info from zookeeper:
GlobalPartitionInformation{partitionMap={0=kafka1:9092, 1=kafka2:9092,
2=kafka3:9092}}
2015-07-23T12:40:02.695+0200 s.k.KafkaUtils [INFO] Task [2/3] assigned
[Partition{host=kafka2:9092, partition=1}]
2015-07-23T12:40:02.695+0200 s.k.ZkCoordinator [INFO] Task [2/3] Deleted
partition managers: []
2015-07-23T12:40:02.695+0200 s.k.ZkCoordinator [INFO] Task [2/3] New
partition managers: []
2015-07-23T12:40:02.695+0200 s.k.ZkCoordinator [INFO] Task [2/3] Finished
refreshing
2015-07-23T12:41:02.696+0200 s.k.ZkCoordinator [INFO] Task [2/3] Refreshing
partition manager connections
2015-07-23T12:41:02.699+0200 s.k.DynamicBrokersReader [INFO] Read partition
info from zookeeper:
GlobalPartitionInformation{partitionMap={0=kafka1:9092, 1=kafka2:9092,
2=kafka3:9092}}
2015-07-23T12:41:02.699+0200 s.k.KafkaUtils [INFO] Task [2/3] assigned
[Partition{host=kafka2:9092, partition=1}]
2015-07-23T12:41:02.699+0200 s.k.ZkCoordinator [INFO] Task [2/3] Deleted
partition managers: []
2015-07-23T12:41:02.699+0200 s.k.ZkCoordinator [INFO] Task [2/3] New
partition managers: []
2015-07-23T12:41:02.699+0200 s.k.ZkCoordinator [INFO] Task [2/3] Finished
refreshing
2015-07-23T12:42:02.735+0200 s.k.ZkCoordinator [INFO] Task [2/3] Refreshing
partition manager connections
2015-07-23T12:42:02.737+0200 s.k.DynamicBrokersReader [INFO] Read partition
info from zookeeper:
GlobalPartitionInformation{partitionMap={0=kafka1:9092, 1=kafka2:9092,
2=kafka3:9092}}
2015-07-23T12:42:02.737+0200 s.k.KafkaUtils [INFO] Task [2/3] assigned
[Partition{host=kafka2:9092, partition=1}]
2015-07-23T12:42:02.737+0200 s.k.ZkCoordinator [INFO] Task [2/3] Deleted
partition managers: []
2015-07-23T12:42:02.737+0200 s.k.ZkCoordinator [INFO] Task [2/3] New
partition managers: []
2015-07-23T12:42:02.737+0200 s.k.ZkCoordinator [INFO] Task [2/3] Finished
refreshing
and then it becomes frozen. Nothing is written into the nimbus log. We've
checked the offsets in ZooKeeper and they're not updated:
{"topology":{"id":"218e58a5-6bfb-4b32-ae89-f3afa19306e1","name":"our-topology"},"offset":12047144,"partition":1,"broker":{"host":"kafka2","port":9092},"topic":"topic"}
cZxid = 0x100028958
ctime = Wed Jul 01 12:22:36 CEST 2015
mZxid = 0x100518527
mtime = Thu Jul 23 12:42:41 CEST 2015
pZxid = 0x100028958
cversion = 0
dataVersion = 446913
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 183
numChildren = 0
Any ideas of what we could be missing? Should we open a Jira Issue?
Thanks!
--
Alex Sobrino Beltrán
Registered Linux User #273657
http://v5tech.es
