database: h2
<home>/logs/atlassian-confluence.log:
2020-02-04 08:35:27,757 WARN [C3P0PooledConnectionPoolManager[identityToken->1bqp46ta82j680u1o7tycd|70e94431]-HelperThread-#2] [mchange.v2.resourcepool.BasicResourcePool] log Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@52e66e2d is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
2020-02-04 08:35:37,455 WARN [C3P0PooledConnectionPoolManager[identityToken->1bqp46ta82j680u1o7tycd|10a55a38]-HelperThread-#0] [mchange.v2.resourcepool.BasicResourcePool] log com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@1073dcf2 -- 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 (30). Last acquisition attempt exception:
org.h2.jdbc.JdbcSQLException: General error: "java.lang.NullPointerException" [50000-196]
at org.h2.message.DbException.getJdbcSQLException(DbException.java:345)
at org.h2.message.DbException.get(DbException.java:168)
at org.h2.message.DbException.convert(DbException.java:295)
at org.h2.engine.Database.openDatabase(Database.java:307)
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)
at org.h2.engine.Engine.createSessionAndValidate(Engine.java:154)
at org.h2.engine.Engine.createSession(Engine.java:137)
at org.h2.server.TcpServerThread.run(TcpServerThread.java:148)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
at org.h2.engine.SessionRemote.done(SessionRemote.java:629)
at org.h2.engine.SessionRemote.initTransfer(SessionRemote.java:144)
at org.h2.engine.SessionRemote.connectServer(SessionRemote.java:453)
at org.h2.engine.SessionRemote.connectEmbeddedOrServer(SessionRemote.java:334)
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:175)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:220)
at com.mchange.v2.c3p0.WrapperConnectionPoolDataSource.getPooledConnection(WrapperConnectionPoolDataSource.java:206)
at com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool$1PooledConnectionResourcePoolManager.acquireResource(C3P0PooledConnectionPool.java:203)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquire(BasicResourcePool.java:1138)
at com.mchange.v2.resourcepool.BasicResourcePool.doAcquireAndDecrementPendingAcquiresWithinLockOnSuccess(BasicResourcePool.java:1125)
at com.mchange.v2.resourcepool.BasicResourcePool.access$700(BasicResourcePool.java:44)
at com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask.run(BasicResourcePool.java:1870)
at com.mchange.v2.async.ThreadPoolAsynchronousRunner$PoolThread.run(ThreadPoolAsynchronousRunner.java:696)
