From e7b6bbffb1786eef842f1e446118a4daa9edf58f Mon Sep 17 00:00:00 2001
From: bitflash-maintainer <noreply@bitflash.invalid>
Date: Wed, 2 Sep 2026 09:04:57 +0000
Subject: worker: back off failed reconnects and say aloud how long the pool
 has been failing

---
 src/main.cpp | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

(limited to 'src/main.cpp')

diff --git a/src/main.cpp b/src/main.cpp
index 0414714..69b2c32 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4394,11 +4394,36 @@ bool BitcoinMiner(int nThreadId)
     // Participant mode: connect to external pool instead of mining solo/operator
     if (nMineMode == MINE_PARTICIPANT)
     {
+        // An attempt that never got a session backs off (10s doubling to
+        // 120s) instead of hammering the same path every flat 10s, and a
+        // streak lasting minutes is said at printf level: the identical
+        // once-per-10s LogPrint line is how a worker idled all night
+        // unnoticed (issue #17). A completed session resets both.
+        int   nRetrySecs    = 10;
+        int64 nFailingSince = 0;
         while (fGenerateBitcoins && nMineMode == MINE_PARTICIPANT && !fShutdown) {
-            PoolParticipantMiner();
+            bool fHadSession = PoolParticipantMiner();
             if (fGenerateBitcoins && nMineMode == MINE_PARTICIPANT && !fShutdown) {
-                LogPrint("worker", "PoolParticipantMiner: reconnecting in 10s\n");
-                for (int i = 0; i < 10 && !fShutdown; i++) Sleep(1000);
+                if (fHadSession) {
+                    nRetrySecs    = 10;
+                    nFailingSince = 0;
+                } else {
+                    if (nFailingSince == 0)
+                        nFailingSince = GetTime();
+                    int64 nMins = (GetTime() - nFailingSince) / 60;
+                    if (nMins >= 1)
+                        printf("[worker] connection to pool %s has been failing"
+                               " for %lld minutes\n",
+                               strParticipantPool.c_str(), (long long)nMins);
+                }
+                LogPrint("worker", "PoolParticipantMiner: reconnecting in %ds\n",
+                         nRetrySecs);
+                for (int i = 0; i < nRetrySecs && !fShutdown; i++) Sleep(1000);
+                if (!fHadSession && nRetrySecs < 120) {
+                    nRetrySecs *= 2;
+                    if (nRetrySecs > 120)
+                        nRetrySecs = 120;
+                }
             }
         }
         return true;
-- 
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