flink配置historyserver_error org.apache.flink.runtime.webmonitor.history.

flink版本1.9.1

1.编辑flink/conf/flink-conf.yaml ，搜索history，主要编辑如下

#==============================================================================
# HistoryServer
#==============================================================================
 
# The HistoryServer is started and stopped via bin/historyserver.sh (start|stop)
#
# # Directory to upload completed jobs to. Add this directory to the list of
# # monitored directories of the HistoryServer as well (see below).
# #jobmanager.archive.fs.dir: hdfs:///completed-jobs/
 jobmanager.archive.fs.dir: hdfs://beh/flink/
#
# # The address under which the web-based HistoryServer listens.
# #historyserver.web.address: 0.0.0.0
 historyserver.web.address: 10.198.162.24
#
# # The port under which the web-based HistoryServer listens.
# #historyserver.web.port: 8082
 historyserver.web.port: 8083
 
# # Comma separated list of directories to monitor for completed jobs.
# #historyserver.archive.fs.dir: hdfs:///completed-jobs/
 historyserver.archive.fs.dir: hdfs://beh/flink/
 
# Interval in milliseconds for refreshing the monitored directories.
#historyserver.archive.fs.refresh-interval: 10000
historyserver.archive.fs.refresh-interval: 10000

2.参数释义

1. jobmanager.archive.fs.dir：flink job运行完成后的日志存放目录
2. historyserver.archive.fs.dir：flink history进程的hdfs监控目录
3. historyserver.web.address：flink history进程所在的主机
4. historyserver.web.port：flink history进程的占用端口
5. historyserver.archive.fs.refresh-interval：刷新受监视目录的时间间隔（以毫秒为单位）。

3.注意jobmanager.archive.fs.dir要和historyserver.archive.fs.dir值一样：

实例：jobmanager.archive.fs.dir:为hdfs://beh/flink/

 historyserver.archive.fs.dir:为hdfs://beh/flink/jobs

job跑完出现如下：

然后查看history页面发现内容为空。

修改 historyserver.archive.fs.dir:为hdfs://beh/flink/后，再次运行job后如下：

然后查看history页面发现不仅吸现在的job，之前运行的也显示出来了。

注1：可以把其他集群的jobs日志拉过来，然后启动history进程进行页面展示。 

注2：启动过程可能报错：

2019-12-20 15:55:29,985 WARN  org.apache.flink.runtime.webmonitor.history.HistoryServer     - Failed to create Path or FileSystem fo
r directory 'hdfs://beh/flink/'. Directory will not be monitored.
org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Could not find a file system implementation for scheme 'hdfs'. The sc
heme is not directly supported by Flink and no Hadoop file system to support this scheme could be loaded.
        at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:447)
        at org.apache.flink.core.fs.FileSystem.get(FileSystem.java:359)
        at org.apache.flink.core.fs.Path.getFileSystem(Path.java:298)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer.<init>(HistoryServer.java:174)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer.<init>(HistoryServer.java:137)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer$1.call(HistoryServer.java:122)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer$1.call(HistoryServer.java:119)
        at org.apache.flink.runtime.security.NoOpSecurityContext.runSecured(NoOpSecurityContext.java:30)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer.main(HistoryServer.java:119)
Caused by: org.apache.flink.core.fs.UnsupportedFileSystemSchemeException: Hadoop is not in the classpath/dependencies.
        at org.apache.flink.core.fs.UnsupportedSchemeFactory.create(UnsupportedSchemeFactory.java:58)
        at org.apache.flink.core.fs.FileSystem.getUnguardedFileSystem(FileSystem.java:443)
        ... 8 more
2019-12-20 15:55:29,988 ERROR org.apache.flink.runtime.webmonitor.history.HistoryServer     - Failed to run HistoryServer.
org.apache.flink.util.FlinkException: Failed to validate any of the configured directories to monitor.
        at org.apache.flink.runtime.webmonitor.history.HistoryServer.<init>(HistoryServer.java:183)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer.<init>(HistoryServer.java:137)
        at org.apache.flink.runtime.webmonitor.history.HistoryServer$1.call(HistoryServer.java:122)

具体解决办法见：https://my.oschina.net/u/2338224/blog/3101005（敬佩大佬无私）

原因是在flink集群的CLASS_PATH下缺少了 HDFS相关的jar，其下载地址为（看个人hadoop和flink版本）：

https://repo.maven.apache.org/maven2/org/apache/flink/flink-shaded-hadoop-2-uber/2.6.5-9.0/