Do not throw exception on failure

Signed-off-by: Sachin Kale <[email protected]>

server/src/main/java/org/opensearch/index/shard/IndexShard.java

@@ -3403,7 +3403,7 @@ private void postActivatePrimaryMode() {
             try {
                 getEngine().translogManager().syncTranslog();
             } catch (IOException e) {
-                throw new IllegalStateException("Failed to sync translog to remote from new primary", e);
+                logger.error("Failed to sync translog to remote from new primary", e);
             }
         }
         ensurePeerRecoveryRetentionLeasesExist();