Don't attempt to cleanup the filesystem if a build is in progress.

This isn't essential but it helps to reduce unnecessary load and processing which would be better spent on building.

src/main/java/org/qortal/arbitrary/ArbitraryDataReader.java

@@ -129,12 +129,13 @@ public class ArbitraryDataReader {
     }
 
     private void preExecute() {
+        ArbitraryDataManager.getInstance().setBuildInProgress(true);
         this.createWorkingDirectory();
         this.createUncompressedDirectory();
     }
 
     private void postExecute() {
-
+        ArbitraryDataManager.getInstance().setBuildInProgress(false);
     }
 
     private void createWorkingDirectory() {

src/main/java/org/qortal/controller/arbitrary/ArbitraryDataCleanupManager.java

@@ -106,6 +106,11 @@ public class ArbitraryDataCleanupManager extends Thread {
 							continue;
 						}
 
+						// Don't interfere with the filesystem whilst a build is in progress
+						if (ArbitraryDataManager.getInstance().getBuildInProgress()) {
+							Thread.sleep(5000);
+						}
+
 						// Fetch the transaction data
 						ArbitraryTransactionData arbitraryTransactionData = ArbitraryTransactionUtils.fetchTransactionData(repository, signature);
 

src/main/java/org/qortal/controller/arbitrary/ArbitraryDataManager.java

@@ -36,6 +36,8 @@ public class ArbitraryDataManager extends Thread {
 
 	private static ArbitraryDataManager instance;
 
+	private boolean buildInProgress = false;
+
 	private volatile boolean isStopping = false;
 
 
@@ -411,6 +413,15 @@ public class ArbitraryDataManager extends Thread {
 	}
 
 
+	public void setBuildInProgress(boolean buildInProgress) {
+		this.buildInProgress = buildInProgress;
+	}
+
+	public boolean getBuildInProgress() {
+		return this.buildInProgress;
+	}
+
+
 	// Network handlers
 
 	public void onNetworkGetArbitraryDataMessage(Peer peer, Message message) {