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# 福建项目:功能端发日志出现大量丢日志的现象
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| ID | Creation Date | Assignee | Status |
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|----|----------------|----------|--------|
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| OMPUB-513 | 2022-06-08T09:22:56.000+0800 | 戚岱杰 | 已关闭 |
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---
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2022.06.07 下午14点,用户生效了一个端口Monitor策略后,部分功能端出现大量丢日志的现象
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2022.06.07 晚关闭该策略,功能端就不丢日志了
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2022.06.08 白天继续打开该策略,用于排查丢日志现象
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下图是2022.06.07下午统计的各个功能端发送日志情况:
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!screenshot-1.png|thumbnail!
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备注:
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目前福州OLAP、泉州OLAP的kafka各3台
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功能端出现丢日志现象时,服务器网卡带宽约 7~9MB/s
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**liuxueli** commented on *2022-06-08T09:29:26.376+0800*:
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* 根据杨阳反馈:kafka一共有三台服务器,三台kafka的带宽分别是 88MB 74MB 104MB ,怀疑已经达到了服务器的磁盘写入速度。
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* kafka broker的性能不足导致功能端的kafka客户端报错 _QUEUE_FULL(Local: Queue full) ;参照: [https://github.com/confluentinc/confluent-kafka-go/issues/346]
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** !image-2022-06-08-09-33-57-327.png!
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**
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{code:java}
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Tue Jun 7 18:35:58 2022, INFO, ./tsglog/tsglog, TSG_SEND_LOG, tsg_send_log to kafka is error of _QUEUE_FULL(Local: Queue full), status: -1, topic: SECURITY-EVENT payload:
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Tue Jun 7 18:35:58 2022, INFO, ./tsglog/tsglog, TSG_SEND_LOG, tsg_send_log to kafka is error of _QUEUE_FULL(Local: Queue full), status: -1, topic: SECURITY-EVENT payload:{code}
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---
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**zhangzhihan** commented on *2022-06-08T16:56:37.690+0800*:
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泉州OLAP三台部署kafka的服务器,写入在100MB/s时磁盘IO就已经达到100%,所以出现功能端丢日志现象
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最终将kafka从HDD切换到SSD后,写入正常,未出现IO高的问题,功能端也未丢日志
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后续将持续观察一段时间
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---
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**doufenghu** commented on *2022-06-08T17:13:24.504+0800*:
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需要跟踪下100MB/s IO 达到100%问题。[~qidaijie]
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---
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**qidaijie** commented on *2022-06-08T17:32:50.466+0800*:
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现场情况:
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1:三台混部服务器仅有kafka使用磁盘;使用HDD时每秒写入次数在110左右,排除有大量小文件的情况。
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!FJ-Kafka-IO.png|thumbnail!
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2:Kafka使用SSD后,写入日志总量未变、Kafka配置未变动,使用率在20%左右。
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3:测试的HDD的IO性能与实际不符,需要对HDD阵列分析和重新测试IO。
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---
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## Attachments
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**28502/FJ-Kafka-IO.png**
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---
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**28453/image-2022-06-08-09-33-57-327.png**
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---
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**28451/screenshot-1.png**
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---
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