Hello

I understand that the compacted topic is meant to keep at least the latest
key value pair.

However, I am having an issue since it can happen that entry becomes old
and I need to remove it. It may also occur, that I am not able to send key
"null" pair. So I need another method to remove my hanging entries. My hope
was with the following configuration:

Topic:test.topic    PartitionCount:30    ReplicationFactor:2
Configs:segment.bytes=1048576,min.cleanable.dirty.ratio=0.1,
delete.retention.ms=1800000,retention.ms=900000,segment.ms
=900000,cleanup.policy=compact,delete
    Topic: test.topic    Partition: 0    Leader: 0    Replicas: 1,0    Isr:
0
    Topic: test.topic    Partition: 1    Leader: 0    Replicas: 0,1    Isr:
0
    Topic: test.topic    Partition: 2    Leader: 0    Replicas: 1,0    Isr:
0
    Topic: test.topic    Partition: 3    Leader: 0    Replicas: 0,1    Isr:
0
    Topic: test.topic    Partition: 4    Leader: 0    Replicas: 1,0    Isr:
0
    Topic: test.topic    Partition: 5    Leader: 0    Replicas: 0,1    Isr:
0
    Topic: test.topic    Partition: 6    Leader: 0    Replicas: 1,0    Isr:
0
    Topic: test.topic    Partition: 7    Leader: 0    Replicas: 0,1    Isr:
0
    Topic: test.topic    Partition: 8    Leader: 0    Replicas: 1,0    Isr:
0
    Topic: test.topic    Partition: 9    Leader: 0    Replicas: 0,1    Isr:
0
    Topic: test.topic    Partition: 10    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 11    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 12    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 13    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 14    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 15    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 16    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 17    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 18    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 19    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 20    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 21    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 22    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 23    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 24    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 25    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 26    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 27    Leader: 0    Replicas: 0,1
Isr: 0
    Topic: test.topic    Partition: 28    Leader: 0    Replicas: 1,0
Isr: 0
    Topic: test.topic    Partition: 29    Leader: 0    Replicas: 0,1
Isr: 0

but it does not get cleaned. I stop writing one key value pair, but still
can see that key value pair after days.

Then I changed broker configuration on the fly:

# The minimum age of a log file to be eligible for deletion
#log.retention.hours=168
log.retention.minutes=16

# A size-based retention policy for logs. Segments are pruned from the log
as long as the remaining
# segments don't drop below log.retention.bytes.
#log.retention.bytes=1073741824
log.retention.bytes=10000

# The maximum size of a log segment file. When this size is reached a new
log segment will be created.
#log.segment.bytes=1073741824
log.segment.bytes=10000

So far I haven't been able to drop away the desired key value pair with any
of these configuration actions.

Am I trying something that is not possible or am I missing some
configuration options or should this work?

br.

Asko Alhoniemi

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