笔记-系统突然无法写入某个文件异常

louiezhou001

发布于 2021-12-10 17:25:59

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发布于 2021-12-10 17:25:59

文章被收录于专栏：测试工程师成长之道

今天一早来公司使用系统，突然报异常，提示某个文件不能写入了，这是....什么情况？原先就已经分配过文件写入权限了。

赶紧上CentOS Server上查下情况：

[zhou@mydata ~]$ df -l
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/xvda1      20641404 10565932   9026948  54% /
tmpfs            4029028        0   4029028   0% /dev/shm
/dev/xvdb1     103210940 67011820  30956312  97% /hotdata

原来是磁盘空间满了，经过一番查阅，发现日志系统文件占用了好几个G的空间，日志包含Nginx 和 Tomcat logs

du -h --max-depth=1:查看该目录空间占用

du -sh *:查看该目录下所有文件及目录的大小

在tomcat目录下conf/logging.properties 这个文件控制tomcat自带的各种日志文件（安装目录/logs目录下的日志文件），这些文件的配置和管理会影响tomcat日常运行过程中对内存的消耗。

先来看看这个conf/logging.properties 文件：

[zhou@izbplay.. conf]$ cat logging.properties
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

handlers = 1catalina.org.apache.juli.AsyncFileHandler, 2localhost.org.apache.jul                                                                i.AsyncFileHandler, 3manager.org.apache.juli.AsyncFileHandler, 4host-manager.org                                                                .apache.juli.AsyncFileHandler, java.util.logging.ConsoleHandler

.handlers = 1catalina.org.apache.juli.AsyncFileHandler, java.util.logging.Consol                                                                eHandler

############################################################
# Handler specific properties.
# Describes specific configuration info for Handlers.
############################################################

1catalina.org.apache.juli.AsyncFileHandler.level = FINE
1catalina.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
1catalina.org.apache.juli.AsyncFileHandler.prefix = catalina.
1catalina.org.apache.juli.AsyncFileHandler.maxDays = 90
1catalina.org.apache.juli.AsyncFileHandler.encoding = UTF-8

2localhost.org.apache.juli.AsyncFileHandler.level = FINE
2localhost.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
2localhost.org.apache.juli.AsyncFileHandler.prefix = localhost.
2localhost.org.apache.juli.AsyncFileHandler.maxDays = 90
2localhost.org.apache.juli.AsyncFileHandler.encoding = UTF-8

3manager.org.apache.juli.AsyncFileHandler.level = FINE
3manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
3manager.org.apache.juli.AsyncFileHandler.prefix = manager.
3manager.org.apache.juli.AsyncFileHandler.maxDays = 90
3manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8

4host-manager.org.apache.juli.AsyncFileHandler.level = FINE
4host-manager.org.apache.juli.AsyncFileHandler.directory = ${catalina.base}/logs
4host-manager.org.apache.juli.AsyncFileHandler.prefix = host-manager.
4host-manager.org.apache.juli.AsyncFileHandler.maxDays = 90
4host-manager.org.apache.juli.AsyncFileHandler.encoding = UTF-8

java.util.logging.ConsoleHandler.level = FINE
java.util.logging.ConsoleHandler.formatter = org.apache.juli.OneLineFormatter
java.util.logging.ConsoleHandler.encoding = UTF-8


############################################################
# Facility specific properties.
# Provides extra control for each logger.
############################################################

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].level = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].handlers = 2localh                                                                ost.org.apache.juli.AsyncFileHandler

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].level =                                                                 INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/manager].handler                                                                s = 3manager.org.apache.juli.AsyncFileHandler

org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].le                                                                vel = INFO
org.apache.catalina.core.ContainerBase.[Catalina].[localhost].[/host-manager].ha                                                                ndlers = 4host-manager.org.apache.juli.AsyncFileHandler

# For example, set the org.apache.catalina.util.LifecycleBase logger to log
# each component that extends LifecycleBase changing state:
#org.apache.catalina.util.LifecycleBase.level = FINE

# To see debug messages in TldLocationsCache, uncomment the following line:
#org.apache.jasper.compiler.TldLocationsCache.level = FINE

# To see debug messages for HTTP/2 handling, uncomment the following line:
#org.apache.coyote.http2.level = FINE

# To see debug messages for WebSocket handling, uncomment the following line:
#org.apache.tomcat.websocket.level = FINE

从这里可以看出它实际控制着tomcat 安装目录下/logs里面的五类日志：catalina、localhost、manager、admin、host-manager 。

另外，tomcat 的日志等级有：日志输出级别：SEVERE (最高级别) > WARNING > INFO > CONFIG > FINE > FINER(精心) > FINEST (所有内容,最低级别),使用日志输出级别越高那么tomcat对内存的消耗就越低，但是具体的级别选择需要根据你自己的情况来定。

将日志清理后，同时调整日志级别，系统恢复正常运行。

总结:

测试是一门技术, 更是一门艺术. 也许你今天拥有的技术, 明天就会被淘汰. 同时需要我们开拓思维和眼界, 积极拥抱变化, 学习新知识, 新方法,新技能, 计算机领域讲究的是实践, 学习更要讲究方式方法. 学习和动手一定要结合, 光看不练,犹如看武功秘籍, 是永远成不了武功大侠的.

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原始发表：2021-12-08，如有侵权请联系 cloudcommunity@tencent.com 删除

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