TSSS instance fails to start on a Linux machine with Open Source R as its statistical engine.
Article ID: KB0075373
Updated On:
| Products | Versions |
|---|---|
| Spotfire Statistics Services | All supported versions |
Description
When you configure TIBCO Spotfire Statistics Services (TSSS) with Open Source R as its statistical engine on a Linux machine, it may fail to start with below error in TSSS server logs (SplusServer.log):
**** Engine startup error ***** Message read thrown an unexpected exception: java.io.EOFException at com.insightful.splusserver.engine.splusengine.SplusMessageServer.checkEngineIsRunning(SplusMessageServer.java:777) at com.insightful.splusserver.engine.splusengine.SplusMessageServer.startEngineProcess(SplusMessageServer.java:681) ... ... 2020-05-19 20:55:58,618 | WARN | | SplusMessageHandler | Failed while sending message of type quit due to ClosedChannelException: null java.nio.channels.ClosedChannelException at sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:270) at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:461) .... .... 2020-05-19 20:55:58,665 | ERROR | | SplusMessageServer | Message read thrown an unexpected exception: java.io.EOFException at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2638) at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:3113) ... ... at java.lang.Thread.run(Thread.java:748)
Cause:
This error occurs if the open-source R path is not correctly set for variable "SPSERVER_RHOME" in the TSSS instance's spserver.properties configuration file, as below:
For example:
----------
## Edit this variable to tell TSSS where R is installed on your system.##
SPSERVER_RHOME=/opt/R/3.4.4
-----------
Environment
Linux OS
Resolution
If you don't know what is the correct path to the open-source R installation on your system, then you can run below command in R console to display the R installation path:
---------
Sys.getenv("R_HOME")
----------
The output of this command would be like below (depending upon your installed open-source R version):
For example:
---------
> Sys.getenv("R_HOME")
[1] "/opt/R/3.4.4/lib/R"
----------
Now, update the SPSERVER_RHOME variable with output from the above command in the "spserver.properties" file located at SPSERVER_HOME/init.d/ as below:
----------
## Edit this variable to tell TSSS where R is installed on your system.##
SPSERVER_RHOME=/opt/R/3.4.4/lib/R
-----------
---------
Sys.getenv("R_HOME")
----------
The output of this command would be like below (depending upon your installed open-source R version):
For example:
---------
> Sys.getenv("R_HOME")
[1] "/opt/R/3.4.4/lib/R"
----------
Now, update the SPSERVER_RHOME variable with output from the above command in the "spserver.properties" file located at SPSERVER_HOME/init.d/ as below:
----------
## Edit this variable to tell TSSS where R is installed on your system.##
SPSERVER_RHOME=/opt/R/3.4.4/lib/R
-----------
Issue/Introduction
TSSS instance fails to start on a Linux machine with Open Source R as its statistical engine.
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