Let auto-disabled crawls recover if low resource condition vanished.

Analog to autodisabled DHT switch autodisabled crawls back on upon mem ok
by remembering the autodisable by conf parameter.

pom.xml

@@ -4,7 +4,7 @@
 
     <groupId>net.yacy</groupId>
     <artifactId>yacycore</artifactId>
-    <version>1.81</version>
+    <version>1.83</version>
     <packaging>jar</packaging>
     <description>YaCy - a Peer to Peer Web Search Engine</description>
     <name>YaCy</name>

source/net/yacy/search/ResourceObserver.java

@@ -92,10 +92,12 @@ public class ResourceObserver {
 			if (!this.sb.crawlJobIsPaused(SwitchboardConstants.CRAWLJOB_LOCAL_CRAWL)) {
 				log.info("pausing local crawls");
 				this.sb.pauseCrawlJob(SwitchboardConstants.CRAWLJOB_LOCAL_CRAWL, "resource observer:" + reason);
+                                this.sb.setConfig(SwitchboardConstants.CRAWLJOB_LOCAL_AUTODISABLED,true);
 			}
 			if (!this.sb.crawlJobIsPaused(SwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL)) {
 				log.info("pausing remote triggered crawls");
 				this.sb.pauseCrawlJob(SwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL, "resource observer:" + reason);
+                                this.sb.setConfig(SwitchboardConstants.CRAWLJOB_REMOTE_AUTODISABLED,true);
 			}
 
     		if ((this.normalizedDiskFree == Space.EXHAUSTED || this.normalizedMemoryFree != Space.AMPLE) && this.sb.getConfigBool(SwitchboardConstants.INDEX_RECEIVE_ALLOW, false)) {
@@ -220,6 +222,14 @@ public class ResourceObserver {
                 this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_ALLOW, true);
                 this.sb.peers.mySeed().setFlagAcceptRemoteIndex(true);
                 this.sb.setConfig(SwitchboardConstants.INDEX_RECEIVE_AUTODISABLED, false);
+            } else if (this.sb.getConfigBool(SwitchboardConstants.CRAWLJOB_LOCAL_AUTODISABLED, false)) {
+                log.info("continue paused local crawls");
+                this.sb.setConfig(SwitchboardConstants.CRAWLJOB_LOCAL_AUTODISABLED,false);
+                this.sb.continueCrawlJob(SwitchboardConstants.CRAWLJOB_LOCAL_CRAWL);
+            } else if (this.sb.getConfigBool(SwitchboardConstants.CRAWLJOB_REMOTE_AUTODISABLED, false)) {
+                log.info("continue paused remote triggered crawls");
+                this.sb.setConfig(SwitchboardConstants.CRAWLJOB_REMOTE_AUTODISABLED,false);
+                this.sb.continueCrawlJob(SwitchboardConstants.CRAWLJOB_REMOTE_TRIGGERED_CRAWL);
             }
             log.info("resources ok");
         }

source/net/yacy/search/SwitchboardConstants.java

@@ -475,7 +475,9 @@ public final class SwitchboardConstants {
     public static final String RESOURCE_DISK_USED_MAX_OVERSHOT    = "resource.disk.used.max.overshot";    
     
     public static final String MEMORY_ACCEPTDHT = "memory.acceptDHTabove";
-    public static final String INDEX_RECEIVE_AUTODISABLED = "memory.disabledDHT";
+    public static final String INDEX_RECEIVE_AUTODISABLED = "memory.disabledDHT"; // set if DHT was disabled by ResourceObserver
+    public static final String CRAWLJOB_LOCAL_AUTODISABLED = "memory.disabledLocalCrawler"; // set if local crawl was disabled by ResourceObserver
+    public static final String CRAWLJOB_REMOTE_AUTODISABLED = "memory.disabledRemoteCrawler"; // set if remote crawl was disabled by ResourceObserver
 
     /*
      * Some constants