Liferayポータルを停止していましたが、数秒後にデータベースを停止し（db2静止、つまり接続が閉じられている）、Liferayの実行が正しく停止しなかったようです。
その後、データベースとliferayを再起動しましたが、ポータルが機能しなくなりました。ブラウザに次のメッセージが表示されます。
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
javax.servlet.ServletException: Servlet execution threw an exception
com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
...
root cause
java.lang.NoSuchMethodError: com.liferay.portal.util.PortalUtil.getCDNHostHttp()Ljava/lang/String;
com.liferay.portal.events.ServicePreActionExt.servicePre(ServicePreActionExt.java:937)
ログを調べたところ、次のメッセージが見つかりました（編集されています）。
SEVERE: Error waiting for multi-thread deployment of directories to completehostConfig.deployWar=Deploying web application archive {0}
java.lang.InterruptedException
at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1000)
WARN [DefaultConnectionTester:203] SQL State '08001' of Exception which occurred during a Connection test (fallback DatabaseMetaData test) implies that the database is invalid, and the pool should refill itself with fresh Connections.
com.ibm.db2.jcc.am.DisconnectNonTransientConnectionException: [jcc][t4][2030][11211][3.63.75] A communication error occurred during operations on the connection's underlying socket, socket input stream, or socket output stream. Error location: Reply.fill() - insufficient data (-1). Message: Insufficient data. ERRORCODE=-4499, SQLSTATE=08001
at com.ibm.db2.jcc.am.fd.a(fd.java:321)
WARN [DefaultConnectionTester:136] SQL State '08001' of Exception tested by statusOnException() implies that the database is invalid, and the pool should refill itself with fresh Connections.
WARN [C3P0PooledConnectionPool:708] A ConnectionTest has failed, reporting that all previously acquired Connections are likely invalid. The pool will be reset.
WARN [NewPooledConnection:486] [c3p0] A PooledConnection that has already signalled a Connection error is still in use!
WARN [NewPooledConnection:487] [c3p0] Another error has occurred [ com.ibm.db2.jcc.am.SqlNonTransientConnectionException: [jcc][t4][10335][10366][3.63.75] Invalid operation: Connection is closed. ERRORCODE=-4470, SQLSTATE=08003 ] which will not be reported to listeners!
com.ibm.db2.jcc.am.SqlNonTransientConnectionException: [jcc][t4][10335][10366][3.63.75] Invalid operation: Connection is closed. ERRORCODE=-4470, SQLSTATE=08003
WARN [BasicResourcePool:1841] com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@4fad5112 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (3). Last acquisition attempt exception:
com.ibm.db2.jcc.am.SqlNonTransientConnectionException: DB2 SQL Error: SQLCODE=-20157, SQLSTATE=08004, SQLERRMC=FUT5MAN;QUIESCE DATABASE;;, DRIVER=3.63.75
ERROR [PortalJobStore:109] MisfireHandler: Error handling misfires: Unexpected runtime exception: null
org.quartz.JobPersistenceException: Unexpected runtime exception: null [See nested exception: java.lang.reflect.UndeclaredThrowableException]
Caused by: java.lang.reflect.UndeclaredThrowableException
at $Proxy279.prepareStatement(Unknown Source)
at org.quartz.impl.jdbcjobstore.StdJDBCDelegate.countMisfiredTriggersInState(StdJDBCDelegate.java:413)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.GeneratedMethodAccessor65.invoke(Unknown Source)
Caused by: java.sql.SQLException: Connections could not be acquired from the underlying database!
at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:106)
Caused by: com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
at com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1319)
現在、Liferayのインストールを開始することはほとんど不可能であることがわかりました。ただし、データベース（完全バックアップを作成しました）とluceneのデータディレクトリがあります。これら2つの機能を使用してLiferayインストールを再作成するにはどうすればよいですか？このデータの一部を新規インストールで回復したいのですが、その方法はありません。