Fei Hui created HDFS-14114:
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Summary: RBF:MIN_ACTIVE_RATIO should be configurable
Key: HDFS-14114
URL: https://issues.apache.org/jira/browse/HDFS-14114
Project: Hadoop HDFS
Issue Type: Bug
Reporter: Fei Hui
The following code contains
{code:java}
if (timeSinceLastActive > connectionCleanupPeriodMs ||
active < MIN_ACTIVE_RATIO * total) {
// Remove and close 1 connection
List<ConnectionContext> conns = pool.removeConnections(1);
for (ConnectionContext conn : conns) {
conn.close();
}
LOG.debug("Removed connection {} used {} seconds ago. " +
"Pool has {}/{} connections", pool.getConnectionPoolId(),
TimeUnit.MILLISECONDS.toSeconds(timeSinceLastActive),
pool.getNumConnections(), pool.getMaxSize());
}
...
if (pool.getNumConnections() < pool.getMaxSize() &&
active >= MIN_ACTIVE_RATIO * total) {
ConnectionContext conn = pool.newConnection();
pool.addConnection(conn);
} else {
LOG.debug("Cannot add more than {} connections to {}",
pool.getMaxSize(), pool);
}
{code}
It affects cleanup and creating Connections. Maybe it should be configurable so
that we can reconfig it to improve performance
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