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    This might be cause due to an overload in your database accesses. Try to implement a queue or using an Executor to access the database server.

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Unable to acquire JDBC Connection
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Could not open connection
java.sql.SQLTransientConnectionException: db-pool - Connection is not available, request timed out after 30602ms.	at com.zaxxer.hikari.pool.HikariPool.createTimeoutException(HikariPool.java:555)	at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:188)	at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:147)	at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:83)	at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)	at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:386)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:84)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:109)	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.connection(StatementPreparerImpl.java:47)	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$5.doPrepare(StatementPreparerImpl.java:146)	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl$StatementPreparationTemplate.prepareStatement(StatementPreparerImpl.java:172)	at org.hibernate.engine.jdbc.internal.StatementPreparerImpl.prepareQueryStatement(StatementPreparerImpl.java:148)	at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1927)	at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1896)	at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1874)	at org.hibernate.loader.Loader.doQuery(Loader.java:919)	at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:336)	at org.hibernate.loader.Loader.doList(Loader.java:2610)	at org.hibernate.loader.Loader.doList(Loader.java:2593)	at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2422)	at org.hibernate.loader.Loader.list(Loader.java:2417)	at org.hibernate.loader.criteria.CriteriaLoader.list(CriteriaLoader.java:109)	at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1787)	at org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:363)	at org.hibernate.internal.CriteriaImpl.uniqueResult(CriteriaImpl.java:385)	at modules.rpc.handler.AuthorizedRancamImpl.lambda$getStatus$3(AuthorizedRancamImpl.java:258)	at utils.JPA.transaction(JPA.java:39)	at utils.JPA.transaction(JPA.java:82)	at modules.rpc.handler.AuthorizedRancamImpl.getStatus(AuthorizedRancamImpl.java:250)	at com.rancam.models.rpc.AuthorizedRancamGrpc$MethodHandlers.invoke(AuthorizedRancamGrpc.java:2249)	at io.grpc.stub.ServerCalls$1$1.onHalfClose(ServerCalls.java:150)	at io.grpc.PartialForwardingServerCallListener.onHalfClose(PartialForwardingServerCallListener.java:48)	at io.grpc.ForwardingServerCallListener.onHalfClose(ForwardingServerCallListener.java:38)	at io.grpc.ForwardingServerCallListener$SimpleForwardingServerCallListener.onHalfClose(ForwardingServerCallListener.java:55)	at io.grpc.Contexts$ContextualizedServerCallListener.onHalfClose(Contexts.java:102)	at io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:260)	at io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$2.runInContext(ServerImpl.java:503)	at io.grpc.internal.ContextRunnable.run(ContextRunnable.java:52)	at io.grpc.internal.SerializingExecutor$TaskRunner.run(SerializingExecutor.java:154)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)