private void createClientCache(String host, int port) {
    clientCacheRule.createClientCache();

    Pool pool = PoolManager.createFactory().addServer(host, port).setSubscriptionEnabled(false)
        .setSubscriptionRedundancy(0).setMinConnections(0).setReadTimeout(20000).setRetryAttempts(1)
        .create(uniqueName);

    ClientRegionFactory crf = clientCacheRule.getClientCache().createClientRegionFactory(LOCAL);
    crf.setPoolName(pool.getName());
    crf.create(uniqueName);
  }
If IOException occurs while updating an entry in an already initialized DiskRegion, then the
cache server should be stopped.

<p>
TRAC #39079: Regions with persistence remain in use after IOException have occurred
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/InitializedDiskRegionWithIoExceptionRegressionTest.java