DevTest WARN org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@2d6b2853{r=0,c=false,a=IDLE,uri=null}

Document ID : KB000113446
Last Modified Date : 10/09/2018
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Issue:
This started about a week ago.

Getting these errors over and over in enterprisedashboard.log file:

2018-07-17 11:50:05,919Z (07:50) [qtp536817917-23] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@2d6b2853{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:16,148Z (07:50) [qtp536817917-24] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@7393aa18{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:22,031Z (07:50) [qtp536817917-23] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@296722d4{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:32,928Z (07:50) [qtp536817917-24] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@7edfaa2{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:35,863Z (07:50) [qtp536817917-23] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@29b5fa4d{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:46,137Z (07:50) [qtp536817917-24] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@71a695c6{r=0,c=false,a=IDLE,uri=null}
2018-07-17 11:50:51,940Z (07:50) [qtp536817917-24] WARN  org.eclipse.jetty.http.HttpParser - bad HTTP parsed: 400 HTTP/0.9 not supported for HttpChannelOverHttp@52f06f56{r=0,c=false,a=IDLE,uri=null}

SQL Server is the database the Enterprise Dashboard is connecting to.
Resolution:
1. Brought down the Enterprise Dashboard.
2. Deleted the enterprisedashboard.log file.
3. Add this line to the logging.properties file: log4j.logger.org.eclipse.jetty.http.HttpParser=ERROR
4. Started the Enterprise Dashboard.

Resolves the excess messages.