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d9803f7a0a33688f7429cf10384244f4770851ca test: add stress tests for initialization (James O'Beirne) 23f85616a8d9c9a1b054e492eca4d199028f34dc test: add node.chain_path and node.debug_log_path (James O'Beirne) Pull request description: In the course of coming up with a test plan for #23280, I thought it would be neat to include a Python snippet showing how I tested the initialization process. I quickly realized I was reinventing the functional test framework... so here's a new test. This change bangs init around like the Fonz hitting a jukebox. It adds some interesting (read: lazy and random) coverage for the initialization process by - interrupting init with SIGTERM after certain log statements, - interrupting init at random points, and - starting init with some essential data missing (block files, block indices, etc.) to test init error paths. As far as I can tell, some of these code paths are uncovered otherwise (namely the startup errors). --- Incidentally, I think I may have uncovered some kind of a bug or race condition with indexing initialization based on an intermittent failure in this testcase. This test sometimes fails after shutting down immediately after `loadblk` thread start: ``` 2021-10-15T21:14:51.295000Z TestFramework (INFO): Starting node and will exit after line 'loadblk thread start' 36 │ 2021-10-15T21:14:51.296000Z TestFramework.node0 (DEBUG): bitcoind started, waiting for RPC to come up 37 │ 2021-10-15T21:14:51.493000Z TestFramework (INFO): terminating node after 110 log lines seen 38 │ 2021-10-15T21:14:51.625000Z TestFramework (INFO): Starting node and will exit after line 'txindex thread start' 39 │ 2021-10-15T21:14:51.625000Z TestFramework.node0 (DEBUG): bitcoind started, waiting for RPC to come up ------> [[ FAILURE HERE ]] 2021-10-15T21:15:21.626000Z TestFramework (WARNING): missed line {bail_line}; bailing now after {num_lines} lines ``` and then fails to start up afterwards. Combined logs showing `Error: txindex best block of the index goes beyond pruned data`, when the node under test is not pruned: ``` node0 2021-10-15T21:16:51.848439Z [shutoff] [validationinterface.cpp:244] [ChainStateFlushed] Enqueuing ChainStateFlushed: block hash=1014bc4ff4917602ae53d10e9dfe230af4b7d52a6cdaa8a47798b9c288180907 node0 2021-10-15T21:16:51.848954Z [shutoff] [init.cpp:302] [Shutdown] Shutdown: done test 2021-10-15T21:16:51.882000Z TestFramework (ERROR): Unexpected exception caught during testing Traceback (most recent call last): File "/home/james/src/bitcoin/test/functional/test_framework/test_framework.py", line 132, in main self.run_test() File "/home/james/src/bitcoin/./test/functional/stress_init.py", line 87, in run_test check_clean_start() File "/home/james/src/bitcoin/./test/functional/stress_init.py", line 60, in check_clean_start node.wait_for_rpc_connection() File "/home/james/src/bitcoin/test/functional/test_framework/test_node.py", line 224, in wait_for_rpc_connection raise FailedToStartError(self._node_msg( test_framework.test_node.FailedToStartError: [node 0] bitcoind exited with status 1 during initialization test 2021-10-15T21:16:51.882000Z TestFramework (DEBUG): Closing down network thread test 2021-10-15T21:16:51.933000Z TestFramework (INFO): Stopping nodes test 2021-10-15T21:16:51.933000Z TestFramework.node0 (DEBUG): Stopping node node0 stderr Error: txindex best block of the index goes beyond pruned data. Please disable the index or reindex (which will download the whole blockchain again) node0 stderr Error: txindex best block of the index goes beyond pruned data. Please disable the index or reindex (which will download the whole blockchain again) node0 stderr Error: txindex best block of the index goes beyond pruned data. Please disable the index or reindex (which will download the whole blockchain again) node0 stderr Error: txindex best block of the index goes beyond pruned data. Please disable the index or reindex (which will download the whole blockchain again) node0 stderr Error: txindex best block of the index goes beyond pruned data. Please disable the index or reindex (which will download the whole blockchain again) ``` ACKs for top commit: laanwj: Code review ACK d9803f7a0a33688f7429cf10384244f4770851ca Tree-SHA512: 4d80dc399daf199a6222e81e47d12d830dc7af07355eddbb7f52479a676a645b8d3d45093ff54a9295f01a163b2f4fe0e038e83fc269969e03d4cfda69eaf111