/**
* @param sn ServerName to get a connection against.
* @return The AdminProtocol we got when we connected to <code>sn</code> May have come from cache,
* may not be good, may have been setup by this invocation, or may be null.
* @throws IOException
*/
@SuppressWarnings("deprecation")
private static AdminService.BlockingInterface getCachedConnection(
ClusterConnection connection, ServerName sn) throws IOException {
if (sn == null) {
return null;
}
AdminService.BlockingInterface service = null;
try {
service = connection.getAdmin(sn);
} catch (RetriesExhaustedException e) {
if (e.getCause() != null && e.getCause() instanceof ConnectException) {
// Catch this; presume it means the cached connection has gone bad.
} else {
throw e;
}
} catch (SocketTimeoutException e) {
LOG.debug("Timed out connecting to " + sn);
} catch (NoRouteToHostException e) {
LOG.debug("Connecting to " + sn, e);
} catch (SocketException e) {
LOG.debug("Exception connecting to " + sn);
} catch (UnknownHostException e) {
LOG.debug("Unknown host exception connecting to " + sn);
} catch (FailedServerException e) {
if (LOG.isDebugEnabled()) {
LOG.debug("Server " + sn + " is in failed server list.");
}
} catch (IOException ioe) {
Throwable cause = ioe.getCause();
if (ioe instanceof ConnectException) {
// Catch. Connect refused.
} else if (cause != null && cause instanceof EOFException) {
// Catch. Other end disconnected us.
} else if (cause != null
&& cause.getMessage() != null
&& cause.getMessage().toLowerCase(Locale.ROOT).contains("connection reset")) {
// Catch. Connection reset.
} else {
throw ioe;
}
}
return service;
}
