This is a collection of Python GDB functions (macros) that can be invoked from a GDB session to aid analysis of Impala core dumps.
To use the functions, source impala-gdb.py as follows:
(gdb) source $IMPALA_HOME/lib/python/impala_py_lib/gdb/impala-gdb.py
Currently, the following functions are available:
1. find-query-ids 2. find-fragment-instances
Here's a sample interaction:
(gdb) help find-query-ids Find IDs of all queries this impalad is currently executing. (gdb) find-query-ids f74c863dff66a34d:1d983cc300000000 364525e12495932b:73f5dd0200000000 bc4a3eec25481981:edda04b800000000 (gdb) (gdb) (gdb) help find-fragment-instances Find all query fragment instance to thread Id mappings in this impalad. (gdb) find-fragment-instances Fragment Instance Id Thread IDs 364525e12495932b:73f5dd02000000a2 [69] 364525e12495932b:73f5dd0200000171 [196, 136] bc4a3eec25481981:edda04b8000001a8 [252, 237, 206] f74c863dff66a34d:1d983cc30000009b [200, 14, 13, 12, 6, 5, 3, 2] f74c863dff66a34d:1d983cc30000013a [4] (gdb)