java - MariaDB NullPointerException While calling stored procedure -


i getting nullpointerexception while calling stored procedure using jpa , mariadb.

it's working fine first time, when try second time it's giving exception.

when restart server it's working again first time.

i using spring boot 1.5.6.

maven dependency :

<dependency>     <groupid>org.mariadb.jdbc</groupid>     <artifactid>mariadb-java-client</artifactid>     <version>1.5.7</version> </dependency>

these application.properties

spring.datasource.url=jdbc:mariadb://localhost:3306/webapp spring.datasource.username=test spring.datasource.password=test spring.datasource.driverclassname=org.mariadb.jdbc.driver spring.jpa.hibernate.ddl-auto=create-drop spring.jpa.show-sql=true

java code is

@override public user register(user user) {     storedprocedurequery storedprocedurequery = entitymanager.createstoredprocedurequery("webapp.register")             .registerstoredprocedureparameter(1, string.class, parametermode.in).setparameter(1, user.getemail())             .registerstoredprocedureparameter(2, string.class, parametermode.in).setparameter(2, user.getpassword())             .registerstoredprocedureparameter(3, string.class, parametermode.in).setparameter(3, user.getname())             .registerstoredprocedureparameter(4, string.class, parametermode.in).setparameter(4, "")             .registerstoredprocedureparameter(5, string.class, parametermode.in).setparameter(5, "")             .registerstoredprocedureparameter(6, long.class, parametermode.out);      storedprocedurequery.execute();      long userid = (long)storedprocedurequery.getoutputparametervalue(6);     user.setuserid(userid);     return user; }

and exception got @ line storedprocedurequery.execute(); is

hibernate: {call webapp.register(?,?,?,?,?,?)}  java.lang.nullpointerexception: null     @ org.mariadb.jdbc.mariadbserverpreparedstatement.prepare(mariadbserverpreparedstatement.java:143) ~[mariadb-java-client-1.5.7.jar:na]     @ org.mariadb.jdbc.mariadbserverpreparedstatement.clone(mariadbserverpreparedstatement.java:134) ~[mariadb-java-client-1.5.7.jar:na]     @ org.mariadb.jdbc.abstractcallableprocedurestatement.clone(abstractcallableprocedurestatement.java:98) ~[mariadb-java-client-1.5.7.jar:na]     @ org.mariadb.jdbc.mariadbprocedurestatement.clone(mariadbprocedurestatement.java:119) ~[mariadb-java-client-1.5.7.jar:na]     @ org.mariadb.jdbc.mariadbprocedurestatement.clone(mariadbprocedurestatement.java:62) ~[mariadb-java-client-1.5.7.jar:na]     @ org.mariadb.jdbc.mariadbconnection.preparecall(mariadbconnection.java:479) ~[mariadb-java-client-1.5.7.jar:na]     @ sun.reflect.nativemethodaccessorimpl.invoke0(native method) ~[na:1.8.0_121]     @ sun.reflect.nativemethodaccessorimpl.invoke(nativemethodaccessorimpl.java:62) ~[na:1.8.0_121]     @ sun.reflect.delegatingmethodaccessorimpl.invoke(delegatingmethodaccessorimpl.java:43) ~[na:1.8.0_121]     @ java.lang.reflect.method.invoke(method.java:498) ~[na:1.8.0_121]     @ org.apache.tomcat.jdbc.pool.proxyconnection.invoke(proxyconnection.java:126) ~[tomcat-jdbc-8.5.16.jar:na]     @ org.apache.tomcat.jdbc.pool.jdbcinterceptor.invoke(jdbcinterceptor.java:108) ~[tomcat-jdbc-8.5.16.jar:na]     @ org.apache.tomcat.jdbc.pool.interceptor.abstractcreatestatementinterceptor.invoke(abstractcreatestatementinterceptor.java:75) ~[tomcat-jdbc-8.5.16.jar:na]     @ org.apache.tomcat.jdbc.pool.jdbcinterceptor.invoke(jdbcinterceptor.java:108) ~[tomcat-jdbc-8.5.16.jar:na]     @ org.apache.tomcat.jdbc.pool.disposableconnectionfacade.invoke(disposableconnectionfacade.java:81) ~[tomcat-jdbc-8.5.16.jar:na]     @ com.sun.proxy.$proxy80.preparecall(unknown source) ~[na:na]     @ org.hibernate.engine.jdbc.internal.statementpreparerimpl$1.doprepare(statementpreparerimpl.java:86) ~[hibernate-core-5.0.12.final.jar:5.0.12.final]     @ org.hibernate.engine.jdbc.internal.statementpreparerimpl$statementpreparationtemplate.preparestatement(statementpreparerimpl.java:172) ~[hibernate-core-5.0.12.final.jar:5.0.12.final]


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