Github user DaveBirdsall commented on a diff in the pull request:
https://github.com/apache/incubator-trafodion/pull/31#discussion_r35012380
--- Diff: core/sql/executor/JavaObjectInterface.cpp ---
@@ -147,19 +147,29 @@ int JavaObjectInterface::createJVM()
}
}
-#ifdef _DEBUG
int debugPort = 0;
const char *debugPortStr = getenv("JVM_DEBUG_PORT");
if (debugPortStr != NULL)
debugPort = atoi(debugPortStr);
- const char *debugTimeoutStr = getenv("JVM_DEBUG_TIMEOUT");
- if (debugTimeoutStr != NULL)
- debugTimeout_ = atoi(debugTimeoutStr);
- const char *suspendOnDebug = getenv("JVM_SUSPEND_ON_DEBUG");
- char debugOptions[300];
- if (debugPort > 0)
+ if (debugPort > 0
+#ifdef NDEBUG
+ // in a release build, only DB__ROOT can debug a process
+ && ComUser::isRootUserID()
+#endif
+ )
{
- debugPort_ = debugPort + (GetCliGlobals()->myPin() % 1000);
+ const char *debugTimeoutStr = getenv("JVM_DEBUG_TIMEOUT");
+ if (debugTimeoutStr != NULL)
+ debugTimeout_ = atoi(debugTimeoutStr);
+ const char *suspendOnDebug = getenv("JVM_SUSPEND_ON_DEBUG");
+ char debugOptions[300];
+
+ debugPort_ = debugPort;
+ // to allow debugging multiple processes at the same time,
+ // specify a port that is a multiple of 1000 and the code will
+ // add pid mod 1000 to the port number to use
+ if (debugPort_ % 1000 == 0)
+ debugPort_ += (GetCliGlobals()->myPin() % 1000);
--- End diff --
What's the probability of port collisions? How does one identify them? I
suppose a way to work around port collisions is to stop and restart the
affected processes?
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