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Commita820b4c

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Make local copy of client hostnames in backend status array.
The other strings, application_name and query string, were snapshotted tolocal memory in pgstat_read_current_status(), but we forgot to do that forclient hostnames. As a result, the client hostname would appear to change inthe local copy, if the client disconnected.Backpatch to all supported versions.Author: Edmund HornerReviewed-by: Michael PaquierDiscussion:https://www.postgresql.org/message-id/CAMyN-kA7aOJzBmrYFdXcc7Z0NmW%2B5jBaf_m%3D_-77uRNyKC9r%3DA%40mail.gmail.com
1 parent72cf7f3 commita820b4c

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‎src/backend/postmaster/pgstat.c

Lines changed: 7 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -3224,6 +3224,7 @@ pgstat_read_current_status(void)
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LocalPgBackendStatus*localtable;
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LocalPgBackendStatus*localentry;
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char*localappname,
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*localclienthostname,
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*localactivity;
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#ifdefUSE_SSL
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PgBackendSSLStatus*localsslstatus;
@@ -3242,6 +3243,9 @@ pgstat_read_current_status(void)
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localappname= (char*)
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MemoryContextAlloc(pgStatLocalContext,
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NAMEDATALEN*NumBackendStatSlots);
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localclienthostname= (char*)
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MemoryContextAlloc(pgStatLocalContext,
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NAMEDATALEN*NumBackendStatSlots);
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localactivity= (char*)
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MemoryContextAlloc(pgStatLocalContext,
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pgstat_track_activity_query_size*NumBackendStatSlots);
@@ -3282,6 +3286,8 @@ pgstat_read_current_status(void)
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*/
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strcpy(localappname, (char*)beentry->st_appname);
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localentry->backendStatus.st_appname=localappname;
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strcpy(localclienthostname, (char*)beentry->st_clienthostname);
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localentry->backendStatus.st_clienthostname=localclienthostname;
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strcpy(localactivity, (char*)beentry->st_activity_raw);
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localentry->backendStatus.st_activity_raw=localactivity;
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localentry->backendStatus.st_ssl=beentry->st_ssl;
@@ -3313,6 +3319,7 @@ pgstat_read_current_status(void)
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localentry++;
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localappname+=NAMEDATALEN;
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localclienthostname+=NAMEDATALEN;
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localactivity+=pgstat_track_activity_query_size;
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#ifdefUSE_SSL
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localsslstatus++;

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