Logstash 报错分析与解决方法
Logstash 报错
Logstash 是 Elastic Stack 中的一部分,用于收集、解析和传输日志数据,在运行过程中,可能会遇到各种错误,导致其停止处理数据,本文将详细探讨几种常见的 Logstash 报错,并提供具体的解决步骤。
常见报错及解决方法
1、报错:Logstash could not be started because there is already another instance using the configured data directory
错误提示:
Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties [20191226T07:31:29,884][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified [20191226T07:31:30,007][FATAL][logstash.runner ] Logstash could not be started because there is already another instance using the configured data directory. If you wish to run multiple instances, you must change the "path.data" setting. [20191226T07:31:30,026][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
原因: 之前运行的实例有缓冲,保存在 path.data 里面有 .lock 文件,删除掉就可以。
解决办法:
1. 在logstash.yml
文件中找到 Data path 的路径(默认在安装目录的 data 目录下)。
2. 删除该路径下的 .lock 文件。
3. 重新启动 Logstash,恢复正常。
2、**报错:Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, \", ', } at line 2, column 11 (byte 20) after input {
stdin { }"
错误提示:
Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties [20191226T07:57:58,880][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified [20191226T07:58:00,268][INFO ][logstash.runner ] Starting Logstash {"logstash.version"=>"6.4.0"} [20191226T07:58:01,379][ERROR][logstash.agent ] Failed to execute action {:action=>LogStash::PipelineAction::Create/pipeline_id:main, :exception=>"LogStash::ConfigurationError", :message=>"Expected one of #, \", ', } at line 2, column 11 (byte 20) after input { stdin { ", :backtrace=>["/usr/share/logstash/logstashcore/lib/logstash/compiler.rb:41:incompile_imperative'", "/usr/share/logstash/logstashcore/lib/logstash/compiler.rb:49:in
compile_graph'", "/usr/share/logslash/logstashcore/lib/logstash/compiler.rb:11:inBLock in compile_sources'", "org/jruby/RubyArray.java:2486:in
map'", "/usr/share/logstash/logstashcore/lib.logstash/pipeline.rb:22:ininitialize'", "/usr/share/logstash/logstashcore/lib/logstash/pipeline.rb:90:in
initialize'", "/usr/logstash/execution/AbstractPipelineExt.java:157:ininitialize'", "/usr/share/logstash/logstashcore/lib/logstash/pipeline_action/create.rb:38:in
execute'", "/usr/share/logstash/logstashcore/lib/logstash/agent.rb:309:in `block in converge_state'"]}
原因: 配置脚本可能符号或空格有问题。
解决办法:
1. 建议手打一遍配置文件。
2. 确保配置文件格式正确,
input { stdin { } } filter { grok { match => { "message" => "%{COMBINEDAPACHELOG}" } } date { match => [ "timestamp" , "dd/MMM/yyyy:HH:mm:ss Z" ] } } output { stdout { codec => rubydebug } }
3. 保存并重新加载配置文件。
4. 重启 Logstash 进程。
3、报错:java.lang.IllegalStateException: Logstash stopped processing because of an error
错误提示:
Sending Logstash logs to /var/log/logstash which is now configured via log4j2.properties [20191226T07:31:29,884][WARN ][logstash.config.source.multilocal] Ignoring the 'pipelines.yml' file because modules or command line options are specified [20191226T07:31:30,007][FATAL][logstash.runner ] Logstash could not be started because there is already another instance using the configured data directory. If you wish to run multiple instances, you must change the "path.data" setting. [20191226T07:31:30,026][ERROR][org.logstash.Logstash ] java.lang.IllegalStateException: Logstash stopped processing because of an error: (SystemExit) exit
原因: 配置错误、资源限制、插件问题或输入/输出问题。
解决办法:
1.检查配置文件: 确保没有语法错误或配置不当,可以使用命令logstash config.test_and_exit f /path/to/your/config.conf
验证配置文件的正确性。
2.查看日志文件: Logstash 的日志文件通常包含有关错误的详细信息,查看位于/var/log/logstash/
目录下的日志文件。
3.检查资源限制: 确保 Logstash 进程有足够的内存和磁盘空间,可以调整 JVM 参数(如 Xmx 和 Xms)来增加内存分配。
4.更新插件: 如果错误与插件有关,尝试更新或回退插件版本,使用命令logstashplugin update
更新插件。
5.检查输入/输出: 确保 Logstash 的输入和输出设置正确,并且相关服务(如 Kafka、Elasticsearch 等)运行正常,检查连接和认证信息。
6.重启 Logstash: 在解决了潜在问题后,尝试重启 Logstash 以恢复处理。
常见问题解答
以下是两个关于 Logstash 报错的常见问题及其解答:
1、问题:Logstash 无法启动,报错信息为“Logstash could not be started because there is already another instance using the configured data directory”怎么办?
答案: 这个错误通常是因为之前运行的 Logstash 实例没有完全关闭,导致数据目录被占用,解决办法是在logstash.yml
文件中更改path.data
设置,或者删除 data 目录中的.lock
文件,然后重新启动 Logstash。
2、问题:Logstash 配置文件有语法错误,如何排查和修复?
答案: 可以使用命令logstash config.test_and_exit f /path/to/your/config.conf
验证配置文件的正确性,如果发现错误,根据错误信息进行修正,保存并重新加载配置文件,然后重启 Logstash 进程。
通过以上分析和解答,相信可以帮助你更好地理解和解决 Logstash 报错的问题,如有更多疑问,请查阅官方文档或社区论坛寻求进一步的帮助。