C3P0 failed to get local inetaddress for Vmid solution under Linux

Com.mchange.v2.c3p0.impl.C3P0ImplUtils Generatevmid Info: Failed to get local inetaddress for VMID. This was unlikely to matter. At all. We ll add some extra randomnessjava.net.UnknownHostException:Along.Fedora:Along.Fedora at Java.net.InetAddress.getLo Calhost (inetaddress.java:1353) at Com.mchange.v2.c3p0.impl.C3P0ImplUtils.generateVmId (c3p0implutils.java:120) at Com.mchange.v2.c3p0.impl.c3p0implutils.<clinit> (c3p0implutils.java:98) at Com.mchange.v2.c3p0.impl.poolbackeddatasourcebase.<init> (poolbackeddatasourcebase.java:227) at Com.mchange.v2.c3p0.impl.abstractpoolbackeddatasource.<init> (abstractpoolbackeddatasource.java:62) at Com.mchange.v2.c3p0.combopooleddatasource.<init> (combopooleddatasource.java:109) at Com.mchange.v2.c3p0.combopooleddatasource.<init> (combopooleddatasource.java:105) at Sun.reflect.NativeConstructorAccessorImpl.newInstance0 (Native Method) at Sun.reflect.NativeConstructorAccessorImpl.newInstance (Nativeconstructoraccessorimpl.java:39) at Sun.reflect.DelegatingConstructorAccessorImpl.newInstance ( delegatingconstructoraccessorimpl.java:27) at Java.lang.reflect.Constructor.newInstance (constructor.java:513) at Org.springframework.beans.BeanUtils.instantiateClass (beanutils.java:100) Mainly because the system did not find the host name Along.fedora corresponding IP, modify the Linux host file can be. The following steps are followed: vi/etc/hosts 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 Along.fedora can be saved. When Linux looks for a domain name, it usually refers to finding the file/etc/hosts and then requesting it from the DNS server when it is not found. Several files related to Linux in host are as follows:/etc/host.conf function: Specifies the hostname lookup method, which usually refers to finding the file/etc/hosts, and then requesting the DNS server when it is not found. For most users, this file content is not changed. Linux:/etc/host.conf file Contents order hosts, Bindmulti on/etc/resolv.conf file function: DNS client configuration file, set DNS server IP address and DNS domain name related files:/etc/ host.conf file format: DomainName domain name search domain nameserver primary_dns_server_ip_addressnameserver second_dns_server_ip_ Address where DomainName and search can exist at the same time, or only one; nameserver can specify multiple/etc/hosts#/etc/hosts# file formats: IPaddress hostname aliases# File features : Provide the host name to the IP address of the corresponding relationship, it is recommended to add the host you often use to this file, you can also add a machine without DNS records to this file, # This will facilitate the network application 127.0.0.1 localhost Localhost.localdomain