Dear experts,
I’m trying to download some of the files on the QCDB to my local machine using the CCDBApi and/or command-line tools described in AliceO2/CCDB. I’m using the lxplus proxy and I am able to access both the ali-qcg and ali-qcdb via Firefox and Chrome, so I suspect the DNS configuration discussed in this thread is set up correctly on my system and is not the culprit here, but I’m not certain.
When I try to download files with the command line tool below I get the following error:
$ o2-ccdb-downloadccdbfile --host ali-qcg.cern.ch:8083 --path qc/TPC/MO/PID/hdEdxMax --dest /tmp/CCDB --timestamp -1
> Querying host ali-qcg.cern.ch:8083 for path qc/TPC/MO/PID/hdEdxMax and timestamp 1643806837131
> [ERROR] curl_easy_perform() failed: Couldn't connect to server
> [ERROR] No ETag found in header for path qc/TPC/MO/PID/hdEdxMax. Aborting.
Similarly, if I run the simple macro below using the CCDBApi I get a similar connection error:
> #include "CCDB/CcdbApi.h"
> using namespace o2;
>
> void testQCDBConnection(){
> ccdb::CcdbApi API; // Initialize CCDB API
> map<std::string, std::string> metadata;
> api.init("http://ali-qcdb.cern.ch:8083/"); // http://ccdb-test.cern.ch:8080 for test-ccdb
>
> std::string path = "qc/TPC/MO/PID/.*"; // Choose which directory to list
>
> std::string file_list = api.list(path); // Read a list of all files in directory
> std::cout << file_list << std::endl;
> }
channel 3: open failed: connect failed: No route to host
Both of these work as expected if I change the URL with http://ccdb-test.cern.ch:8080/.
Have you perhaps encountered a similar problem before or have any ideas what might be the issue in my case? Are you for example able to access the QCDB with similar commands to the one listed above from within the CERN network without needing the proxy?
I look forward to hearing your ideas and thanks for the continued support!
Cheers,
Berkin