Gengliang Wang created SPARK-25711:
--------------------------------------
Summary: Allow history server to show usage
Key: SPARK-25711
URL: https://issues.apache.org/jira/browse/SPARK-25711
Project: Spark
Issue Type: Improvement
Components: Spark Core
Affects Versions: 2.4.0
Reporter: Gengliang Wang
Currently, if we try run
```
./start-history-server.sh -h
```
We will get such error
```
java.io.FileNotFoundException: File -h does not exist
```
This is not user friendly.
After fix, we can get following output:
```
Usage: ./sbin/start-history-server.sh [options]
Options:
DIR Deprecated; set spark.history.fs.logDirectory
directly
--dir DIR (-d DIR) Deprecated; set spark.history.fs.logDirectory
directly
--properties-file FILE Path to a custom Spark properties file.
Default is conf/spark-defaults.conf.
Configuration options can be set by setting the corresponding JVM system
property.
History Server options are always available; additional options depend on the
provider.
History Server options:
spark.history.ui.port Port where server will listen for
connections
(default 18080)
spark.history.acls.enable Whether to enable view acls for all
applications
(default false)
spark.history.provider Name of history provider class (defaults to
file system-based provider)
spark.history.retainedApplications Max number of application UIs to keep
loaded in memory
(default 50)
FsHistoryProvider options:
spark.history.fs.logDirectory Directory where app logs are stored
(default: file:/tmp/spark-events)
spark.history.fs.updateInterval How often to reload log data from storage
(in seconds, default: 10)
```
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