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Type:
Bug
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Resolution: Done
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Priority:
Major - P3
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Affects Version/s: WT2.6.1
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Component/s: None
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None
Hi!
I got a crash while recreating index:
#include <assert.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <wiredtiger.h> #define WT_HOME "db" #define WT_CALL(call) \ do { \ const int __rc = call; \ if (__rc != 0) { \ fprintf(stderr, # call " at (%s:%d) failed: %s [%d]\n", __FILE__, __LINE__, wiredtiger_strerror(__rc), __rc); \ exit(EXIT_FAILURE); \ } \ } while (0) static int me(WT_EXTRACTOR *extractor, WT_SESSION *session, const WT_ITEM *key, const WT_ITEM *value, WT_CURSOR *result_cursor) { //some extractor //it's not called in this program exit(1); } static WT_EXTRACTOR my_extractor = {me, NULL, NULL}; int main(void) { WT_CONNECTION *conn; WT_SESSION *session; WT_CURSOR *cursor; const char* idx1 = "index:main:aab"; const char* idx2 = "index:main:aaa"; // "aaa" < "aab" by strcmp assert(system("rm -rf \"" WT_HOME "\" && mkdir \"" WT_HOME "\"") == 0); WT_CALL(wiredtiger_open(WT_HOME, NULL, "create", &conn)); WT_CALL(conn->open_session(conn, NULL, NULL, &session)); WT_CALL(session->create(session, "table:main", "columns=(k,v)")); WT_CALL(conn->add_extractor(conn, "ex1", &my_extractor, NULL)); WT_CALL(conn->add_extractor(conn, "ex2", &my_extractor, NULL)); //create both indexes WT_CALL(session->create(session, idx1, "extractor=ex1,key_format=u")); WT_CALL(session->create(session, idx2, "extractor=ex2,key_format=u")); //recreate index 1 WT_CALL(session->drop(session, idx1, "force=true")); WT_CALL(session->create(session, idx1, "extractor=ex1,key_format=u")); //recreate index 2 WT_CALL(session->drop(session, idx2, "force=true")); //crash WT_CALL(session->create(session, idx2, "extractor=ex2,key_format=u")); WT_CALL(conn->close(conn, NULL)); return 0; }
gdb backtrace is:
Program received signal SIGSEGV, Segmentation fault.
__wt_schema_get_index (session=0x7ffff290b900, uri=0x4016c6 "index:main:aaa", quiet=1, tablep=0x7fffffffde30, indexp=0x7fffffffde10)
at /wiredtiger/2.6.1/src/src/schema/schema_open.c:572
572 if (strcmp(idx->name, uri) == 0) {
#0 __wt_schema_get_index (session=0x7ffff290b900, uri=0x4016c6 "index:main:aaa", quiet=1, tablep=0x7fffffffde30, indexp=0x7fffffffde10)
at /wiredtiger/2.6.1/src/src/schema/schema_open.c:572
#1 0x00007ffff47ba780 in __drop_index (session=0x7ffff290b900, uri=0x4016c6 "index:main:aaa", cfg=<optimized out>, force=<optimized out>)
at /wiredtiger/2.6.1/src/src/schema/schema_drop.c:88
#2 __wt_schema_drop (session=0x7ffff290b900, uri=0x4016c6 "index:main:aaa", cfg=0x7fffffffde70)
at /wiredtiger/2.6.1/src/src/schema/schema_drop.c:182
#3 0x00007ffff47c40f7 in __session_drop (wt_session=0x7ffff290b900, uri=0x4016c6 "index:main:aaa", config=<optimized out>)
at /wiredtiger/2.6.1/src/src/session/session_api.c:530
#4 0x00000000004013d9 in main () at main.cpp:64
Its look like __wt_schema_get_table() returns WT_TABLE structure with
table->nindices > 0
and
table->indices[i] == NULL
if recreating index in the same order as in the above code with indexes
strcmp(idx1, idx2) > 0