localhost - java H2 hanging on getLocalhost on arm32 device

Question

My application works fine on Windows, OSX an, Ubuntu and other flavours of linux until now.

On an arm 32 machine using jdk-8u121-linux-arm32-vfp-hflt.tar.gz it is hanging for five minutes on trying to create a Hibernate database using pure java database H2 and then giving up

public static void recreateDatabase()
    {
        Configuration config;
        config =
                HibernateUtil.getInitializedConfigurationAndRebuildAuditTables();
        new SchemaExport(config).create(false,true);
        factory = config.buildSessionFactory();
    }

I ran jstack during this period, of the relevent threads I think the key one is the 2nd one listed stuck at java.net.Inet4AddressImpl.lookupAllHostAddr but it just seem to be trying to get localhost , the machine is actually an embedded device and I wonder if that could mean it has weird networking that could be causing an issue ?

I have updated to the latest version of h2 (1.4.194), and the latest version of hibernate I could use without needing code changes (4.3.11.Final) due to changes they make to SchemaExport after that.

"main" #1 prio=5 os_prio=0 tid=0xb6105890 nid=0x7580 in Object.wait() [0xb6336000]
   java.lang.Thread.State: WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x7c042900> (a com.mchange.v2.resourcepool.BasicResourcePool)
        at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1414)
        at com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:606)
        - locked <0x7c042900> (a com.mchange.v2.resourcepool.BasicResourcePool)
        at com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:526)
        at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutAndMarkConnectionInUse(C3P0PooledConnectionPool.java:755)
        at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:682)
        at com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:140)
        at org.hibernate.c3p0.internal.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:90)
        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl$ConnectionProviderJdbcConnectionAccess.obtainConnection(JdbcServicesImpl.java:279)
        at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:124)
        at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
        at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
        at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
        at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1930)
        at com.jthink.songlayer.hibernate.HibernateUtil.recreateDatabase(HibernateUtil.java:135)
        at com.jthink.songkong.cmdline.CmdCreateDatabase.start(CmdCreateDatabase.java:27)
        at com.jthink.songkong.cmdline.SongKong.cmdCheckDatabase(SongKong.java:1904)
        at com.jthink.songkong.cmdline.SongKong.cmdlineStart(SongKong.java:1574)
        at com.jthink.songkong.cmdline.SongKong.finish(SongKong.java:1699)
        at com.jthink.songkong.cmdline.SongKongForMelco.main(SongKongForMelco.java:33)

Running jstack during this 5 minute period I see:

"C3P0PooledConnectionPoolManager[identityToken->tys5dp9n86d1sl8vqh|f278eb]-HelperThread-#0" #9 daemon prio=5 os_prio=0 tid=0x7a1747b8 nid=0x75d3 runnable [0x79d60000]
       java.lang.Thread.State: RUNNABLE
            at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
            at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
            at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
            at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
            - locked <0x8eddfe38> (a java.lang.Object)
            at org.h2.util.NetUtils.getLocalAddress(NetUtils.java:272)
            - locked <0x7c040f80> (a java.lang.Class for org.h2.util.NetUtils)
            at org.h2.store.FileLock.lockSocket(FileLock.java:380)
            at org.h2.store.FileLock.lock(FileLock.java:138)
            - locked <0x7be62750> (a org.h2.store.FileLock)
            at org.h2.engine.Database.open(Database.java:662)
            - locked <0x7bc23a90> (a org.h2.engine.Database)
            at org.h2.engine.Database.openDatabase(Database.java:276)
            at org.h2.engine.Database.<init>(Database.java:270)
            at org.h2.engine.Engine.openSession(Engine.java:64)
            at org.h2.engine.Engine.openSession(Engine.java:176)
            - locked <0x8ee8bc50> (a org.h2.engine.Engine)
            at org.h2.engine.Engine.createSessionAndValidate(Engine.java:154)
            at org.h2.engine.Engine.createSession(Engine.java:137)
            at org.h2.engine.Engine.createSession(Engine.java:27)
            at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:354)
            at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:116)
            at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:100)
            at org.h2.Driver.connect(Driver.java:69)
            at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
            at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
            at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
            at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
            at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
            at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
            at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
            at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
            at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)

and then a number of threads with

"C3P0PooledConnectionPoolManager[identityToken->tys5dp9n86d1sl8vqh|f278eb]-HelperThread-#2" #11 daemon prio=5 os_prio=0 tid=0x7a312eb0 nid=0x75d5 waiting for monitor entry [0x79c]
   java.lang.Thread.State: BLOCKED (on object monitor)
        at org.h2.engine.Engine.openSession(Engine.java:169)
        - waiting to lock <0x8ee8bc50> (a org.h2.engine.Engine)
        at org.h2.engine.Engine.createSessionAndValidate(Engine.java:154)
        at org.h2.engine.Engine.createSession(Engine.java:137)
        at org.h2.engine.Engine.createSession(Engine.java:27)
        at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:354)
        at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:116)
        at org.h2.jdbc.JdbcConnection.<init>(JdbcConnection.java:100)
        at org.h2.Driver.connect(Driver.java:69)
        at com.mchange.v2.c3p0.DriverManagerDataSource.getConnection(DriverManagerDataSource.java:146)
        at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:195)
        at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:184)
        at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:200)
        at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1086)
        at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1073)
        at com.mchange.v2.resourcepool.BasicResourcePool.access$800(BasicResourcePool.java:44)
        at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1810)
        at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:648)

Update with network info

more /etc/hosts

127.0.0.1       localhost

more /etc/resolv.conf

# Generated by dhcpcd for interface br0
nameserver 192.168.0.1

Update

Just been pointed out to me the issue is with H2 not **Hibernate, can this be amended to use a different method, it is H2 that is making the call in its NetUtils class

Answer 1

I fixed in by adding this h2 property to my HibernateUtil configuration

System.setProperty("h2.bindAddress", InetAddress.getLoopbackAddress().getHostAddress());

I just hope it doesnt break any currenlty working installations !