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173 questions
0
votes
1
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68
views
No Persistence provider for EntityManager exception given in IntelliJ IDEA
The problem is that I can't use my persistence xml file to create an EntityManager, as they say I don't provide one for And_GG.storefront. (my DB name with no typos)
This is the file:
<persistence ...
user24696530
0
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0
answers
1k
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how to handle ORA-17820: The network adapter could not establish the connection error
I want catch db error when trying to connect to it
My code:
private static String getValueFromDB(String dbConnection,String dbUsername,String dbPassword,String condition,String field){
String ...
0
votes
1
answer
147
views
Having errors when calling repository methods in spring boot application
I am getting this error when calling repository methods at the bottom of the method. When those repository methods moved to top of the method they work.
These are the errors I am getting,
org....
- 1
2
votes
1
answer
2k
views
SQLNonTransientConnectionException: Socket fail to connect to host. Error when trying to connect to remote MariaDB with Java
I'm facing an issue while connecting to a remote MariaDB database from my work using Java. I have to use an SSH connection.
For the SSH part, I'm using the dependency Jsch
<dependency>
<...
- 21
0
votes
1
answer
1k
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How to catch a specific exception message thrown by a SpringBootApplication?
I have a Spring Boot application that connects to a database. The main class is this:
@SpringBootApplication
public class OurApplication {
public static void main(String[] args) {
try {
...
- 3,891
0
votes
1
answer
2k
views
Oracle 19c upgrade: JDBC error java.sql.SQLRecoverableException: Closed Connection
We have recently upgraded Oracle database from 11g release2 to 19c.
Now we have Oracle 19c database server, JDK 1.8 and ojdbc6.jar combination.
We have some java code to create JDBC Statement object ...
- 720
0
votes
0
answers
30
views
JEE Servlet SQLException practice [duplicate]
Is it good practice to handle exception like this? Or there is any better alternative way to do it?
The code works fine but I feel that not all the Exceptions of getAllGrades() method will be shown ...
1
vote
1
answer
757
views
How can I recognize a specific Postgres CONSTRAINT
We used to have a constraint in the (Java) domain logic that prevented an entity (foo,task_id) of being inserted into table entity_a if a that task_id was already present. We then threw a specific ...
- 23.1k
1
vote
1
answer
296
views
java exception : Before start of result set [duplicate]
I have two tables the first one is for "course" and the other is for "exam":
I want select exams which are matched to the code, of course, get by entering its name (nomCours)
here ...
0
votes
1
answer
515
views
JDBC Exception when setting parameters on a prepared statement
I would appreciate the help with the following:
I am getting JDBCException when setting parameters onto JDBC prepared statement.
The fragment of the query where the error is looks like this
... AND (...
- 470
0
votes
1
answer
815
views
Get SQLState from SQLException exception
I have code which throws SQLException wrapped in RuntimeException, like as:
} catch (RuntimeException e) {
Throwable t = e.getCause();
while ((t != null) && !(t instanceof ...
- 11
0
votes
0
answers
1k
views
Optimal way to retry a JDBC connection:
I have a remote database that I access through JDBC. Network is pretty poor this side so I get a couple of network related SQLExceptions when I'm sometimes working with the application.
I've decided ...
- 29
0
votes
1
answer
176
views
Why do I get a SQLException even if I don't commit?
I have a method to check how commit is work. I'm trying to set wrong values to get exception and check when it throws. I thought it will be after commit ,but it throws when I use the executeUpdate ...
- 189
0
votes
1
answer
241
views
Getting Exausted ResultSet Error in Java jdbc oracle [duplicate]
This is the code for jdbc which is written in eclipse. I am just trying to store the result of the query to ResultSet rs and adding it to String name. But on execution the below code i am facing ...
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2
votes
1
answer
535
views
Throwing custom exception on an empty ResultSet on JDBC
I have an issue with a boolean statement while trying to use a custom exception.
when using my code to check if a coupons exists in the db, it returns true when it exists. however, when
coupon does ...
- 120