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https://issues.apache.org/jira/browse/KAFKA-593?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13486990#comment-13486990
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Jun Rao commented on KAFKA-593:
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Producer used sync mode. So, there is 1 message per batch and each segment has
about 100 messages. I expect at least 2 index entries being added per segment.
> Empty log index file created when it shouldn't be empty
> -------------------------------------------------------
>
> Key: KAFKA-593
> URL: https://issues.apache.org/jira/browse/KAFKA-593
> Project: Kafka
> Issue Type: Bug
> Reporter: Yang Ye
> Attachments: kafka_583_zk_kafka_data.tar.gz
>
>
> We have met empty index file during system test when it shouldn't be empty.
> In this case, there're around 100 messages in each segment, each of size
> around 100 bytes, given the "logIndexIntervalBytes" 4096, there should be at
> least 2 log index entries, but we see empty index file. The kafka and
> zookeeper logs are attached
> [yye@yye-ld kafka_server_3_logs]$ cd test_1-2/
> [yye@yye-ld test_1-2]$ ls -l
> total 84
> -rw-r--r-- 1 yye eng 8 Oct 29 15:22 00000000000000000000.index
> -rw-r--r-- 1 yye eng 10248 Oct 29 15:22 00000000000000000000.log
> -rw-r--r-- 1 yye eng 8 Oct 29 15:22 00000000000000000100.index
> -rw-r--r-- 1 yye eng 10296 Oct 29 15:22 00000000000000000100.log
> -rw-r--r-- 1 yye eng 0 Oct 29 15:23 00000000000000000200.index
> -rw-r--r-- 1 yye eng 10293 Oct 29 15:23 00000000000000000200.log
> -rw-r--r-- 1 yye eng 0 Oct 29 15:23 00000000000000000300.index
> -rw-r--r-- 1 yye eng 10274 Oct 29 15:23 00000000000000000300.log
> -rw-r--r-- 1 yye eng 0 Oct 29 15:23 00000000000000000399.index
> -rw-r--r-- 1 yye eng 10276 Oct 29 15:23 00000000000000000399.log
> -rw-r--r-- 1 yye eng 0 Oct 29 15:23 00000000000000000498.index
> -rw-r--r-- 1 yye eng 10256 Oct 29 15:23 00000000000000000498.log
> -rw-r--r-- 1 yye eng 10485760 Oct 29 15:23 00000000000000000596.index
> -rw-r--r-- 1 yye eng 3564 Oct 29 15:23 00000000000000000596.log
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