CR Hota created HDFS-13834:
------------------------------
Summary: RBF: Connection creator thread should catch Throwable
Key: HDFS-13834
URL: https://issues.apache.org/jira/browse/HDFS-13834
Project: Hadoop HDFS
Issue Type: Bug
Environment:
{code:java}
@Override
public void run() {
while (this.running) {
try {
ConnectionPool pool = this.queue.take();
try {
int total = pool.getNumConnections();
int active = pool.getNumActiveConnections();
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);
}
} catch (IOException e) {
LOG.error("Cannot create a new connection", e);
}
} catch (InterruptedException e) {
LOG.error("The connection creator was interrupted");
this.running = false;
}
}
{code}
Reporter: CR Hota
Assignee: CR Hota
Connection creator thread is a single thread thats responsible for creating all
downstream namenode connections.
This is very critical thread and hence should not die understand
exception/error scenarios.
We saw this behavior in production systems where the thread died leaving the
router process in bad state.
The thread should also catch a generic error/exception.
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