ThingWorx Platform 9 へのアップグレード後に PostgreSQL SSL を有効にすると、「基盤となるデータベースから接続を取得できませんでした」というメッセージが表示されます。

[L: INFO] [O: c.t.s.ThingWorxServer] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] WebApp starting...
[L: INFO] [O: c.t.s.ThingWorxPersistenceHandler] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] Default Persistence Provider Name = ThingworxPersistenceProvider
[L: INFO] [O: c.t.s.ThingWorxPersistenceHandler] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] Default Persistence Provider Package Name = PostgresPersistenceProviderPackage
[L: INFO] [O: c.t.p.p.PostgresDatasource] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] Reading configuration from configTableCol
[L: WARN] [O: c.m.v.r.BasicResourcePool] [I: ] [U: ] [S: ] [P: ] [T: C3P0PooledConnectionPoolManager[identityToken-><Token>]-HelperThread-#2]
[L: WARN] [O: c.m.v.r.BasicResourcePool] [I: ] [U: ] [S: ] [P: ] [T: C3P0PooledConnectionPoolManager[identityToken-><Token>]-HelperThread-#1] com.mchange.v2.resourcepool.BasicResourcePool$ScatteredAcquireTask@47815d04 -- 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:
[L: WARN] [O: c.m.v.r.BasicResourcePool] [I: ] [U: ] [S: ] [P: ] [T: C3P0PooledConnectionPoolManager[identityToken-><Token>]-HelperThread-#1] Having failed to acquire a resource, com.mchange.v2.resourcepool.BasicResourcePool@67b60899 is interrupting all Threads waiting on a resource to check out. Will try again in response to new client requests.
...
[L: ERROR] [O: c.t.s.ThingWorxBootstrapper] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] *** CRITICAL ERROR ON STARTUP: Connections could not be acquired from the underlying database!
[L: ERROR] [O: c.t.s.ThingWorxBootstrapper] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] *** Web Application STATE is being set to ERROR! ***
[L: INFO] [O: c.t.s.ThingWorxServer] [I: ] [U: SuperUser] [S: ] [P: ] [T: main] >>>>>>> PLATFORM SHUTDOWN START <<<<<<<<<