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LHS
Posts: 26
Posted 23:29 Apr 17, 2019 |

I can get my lab18 program to run and connect to the cs3 server on eclipse, but after I deploy to cs3 and run it on cs3 it seems to have issues connecting. 

I keep getting an 

java.lang.NoClassDefFoundError: Could not initialize class com.mysql.cj.util.Util error.

I know it means its not connecting due to the sql connector jar not being found, I just don't understand why it works on my computer, but not cs3.

kevinNgo
Posts: 3
Posted 23:32 Apr 17, 2019 |

I got the same problems before. My suggest solution is delete all of files which call the jdbc driver, then upload everything again. It works for me.

LHS
Posts: 26
Posted 23:42 Apr 17, 2019 |

Unfortunately that hasn't worked for me. I still get the same issue. 

cysun
Posts: 2935
Posted 23:48 Apr 17, 2019 |

See the HelloJDBC example. If it works for Lab 16, it should work for Lab 18.

LHS
Posts: 26
Posted 00:01 Apr 18, 2019 |

I changed the code to work exactly like lab 16, I deleted and re-uploaded as well, it works on my computer, but I still get the same error on the deployed version on cs3.

 

cysun
Posts: 2935
Posted 08:10 Apr 18, 2019 |
LHS wrote:

I changed the code to work exactly like lab 16, I deleted and re-uploaded as well, it works on my computer, but I still get the same error on the deployed version on cs3.

 

Reloading the project seems to have fixed the problem.