[
https://issues.apache.org/jira/browse/DRILL-5015?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15653519#comment-15653519
]
ASF GitHub Bot commented on DRILL-5015:
---------------------------------------
Github user sohami commented on a diff in the pull request:
https://github.com/apache/drill/pull/648#discussion_r87351696
--- Diff:
exec/java-exec/src/main/java/org/apache/drill/exec/client/DrillClient.java ---
@@ -223,19 +223,65 @@ public void connect(Properties props) throws
RpcException {
connect(null, props);
}
+ /**
+ * Function to populate the endpointList with information of all the
drillbits
+ * provided in the connection string by client
+ * @param endpointList - ArrayList of DrillbitEndpoints
+ * @param drillbits - One or more drillbit ip[:port] provided in
connection string
+ */
+ public void populateEndpointsList(ArrayList<DrillbitEndpoint>
endpointList, String drillbits){
+
+ // If no information about drillbits is provided then just return
empty list.
+ if(drillbits == null || drillbits.length() == 0){
+ return;
+ }
+ final String[] connectInfo = drillbits.split(",");
+
+ /* For direct connection we can get URL string having drillbit
property as below:
+ drillbit=<ip>:<port> --- Use the IP and port specified as the
Foreman IP and port
+ drillbit=<ip> --- Use the IP specified as the Foreman IP
with default port in config file
+ drillbit=<ip1>:<port1>,<ip2>:<port2>... --- Randomly select the
IP and port pair from the specified
+ list as the Foreman
IP and port.
+
+ Fetch ip address and port information for each drillbit and
populate the list
+ */
+ for(String info : connectInfo){
+ info = info.trim();
+
+ if(info != null){
+ // Split each info to get ip address and port value
+ final String[] drillbitInfo = info.split(":");
+
+ // Check for malformed ip:port string
+ if(drillbitInfo == null || drillbitInfo.length == 0){
+ continue;
+ }
+
+ /* If port is present use that one else use the configured one
+ Assumptions: 1) IP Address provided in connection string is
valid
+ 2) Port without IP address is never specified.
+ */
+ final String port = (drillbitInfo.length == 2) ? drillbitInfo[1] :
config.getString(ExecConstants.INITIAL_USER_PORT);
+ final DrillbitEndpoint endpoint = DrillbitEndpoint.newBuilder()
+ .setAddress(drillbitInfo[0])
+
.setUserPort(Integer.parseInt(port))
+ .build();
+ endpointList.add(endpoint);
+ }
+ }
+ }
+
public synchronized void connect(String connect, Properties props)
throws RpcException {
if (connected) {
return;
}
final DrillbitEndpoint endpoint;
+ final ArrayList<DrillbitEndpoint> endpoints = new ArrayList<>();
--- End diff --
fixed
> As per documentation, when issuing a list of drillbits in the connection
> string, we always attempt to connect only to the first one
> -----------------------------------------------------------------------------------------------------------------------------------
>
> Key: DRILL-5015
> URL: https://issues.apache.org/jira/browse/DRILL-5015
> Project: Apache Drill
> Issue Type: Bug
> Components: Client - JDBC
> Affects Versions: 1.8.0, 1.9.0
> Reporter: Sorabh Hamirwasia
> Assignee: Sudheesh Katkam
>
> When trying to connect to a Drill cluster by specifying more than 1 drillbits
> to connect to, we always attempt to connect to only the first drillbit.
> As an example, we tested against a pair of drillbits, but we always connect
> to the first entry in the CSV list by querying for the 'current' drillbit.
> The remaining entries are never attempted.
> [root@pssc-60 agileSqlPerfTests]# /opt/mapr/drill/drill-1.8.0/bin/sqlline -u
> "jdbc:drill:schema=dfs.tmp;drillbit=pssc-61:31010,pssc-62:31010" -f
> whereAmI.q | grep -v logback
> 1/1 select * from sys.drillbits where `current`;
> +-----------------+------------+---------------+------------+----------+
> | hostname | user_port | control_port | data_port | current |
> +-----------------+------------+---------------+------------+----------+
> | pssc-61.qa.lab | 31010 | 31011 | 31012 | true |
> +-----------------+------------+---------------+------------+----------+
> 1 row selected (0.265 seconds)
> Closing: org.apache.drill.jdbc.impl.DrillConnectionImpl
> apache drill 1.8.0
> "a little sql for your nosql"
> This property is meant for use by clients when not wanting to overload the ZK
> for fetching a list of existing Drillbits, but the behaviour doesn't match
> the documentation.
> [Making a Direct Drillbit Connection |
> https://drill.apache.org/docs/using-the-jdbc-driver/#using-the-jdbc-url-format-for-a-direct-drillbit-connection
> ]
> We need to randomly shuffle between this list and If an entry in the shuffled
> list is unreachable, we need to try for the next entry in the list.
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