John Gaskin created HAWQ-1486:
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Summary: PANIC accessing PXF HDFS table
Key: HAWQ-1486
URL: https://issues.apache.org/jira/browse/HAWQ-1486
Project: Apache HAWQ
Issue Type: Bug
Components: External Tables, PXF
Reporter: John Gaskin
Assignee: Vineet Goel
Fix For: 2.3.0.0-incubating
This code doesn't catch the case when churl_init_download() returns NULL. This
seems to trigger a segfault at libcurl level.
{code}
Looks like we failed to connect to PXF (?).
Piece of code in HAWQ handling cUrl calls (pxfutils.c):
100 static void process_request(ClientContext* client_context, char *uri)
101 {
102 size_t n = 0;
103 char buffer[RAW_BUF_SIZE];
104
105 print_http_headers(client_context->http_headers);
106 client_context->handle = churl_init_download(uri,
client_context->http_headers);
107 memset(buffer, 0, RAW_BUF_SIZE);
108 resetStringInfo(&(client_context->the_rest_buf));
109
110 /*
111 * This try-catch ensures that in case of an exception during the
"communication with PXF and the accumulation of
112 * PXF data in client_context->the_rest_buf", we still get to
terminate the libcurl connection nicely and avoid
113 * leaving the PXF server connection hung.
114 */
115 PG_TRY();
116 {
117 /* read some bytes to make sure the connection is established */
118 churl_read_check_connectivity(client_context->handle);
{code}
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