Always use a thread pool of at least size 1.

Fixes #161.
2018-11-19 19:36:13 -08:00
parent 3b888a72b7
commit df2ff3fddb
1 changed files with 2 additions and 1 deletions
@@ -110,7 +110,8 @@ public class SysProps
    /** Returns the number of threads used to perform digesting and verifying operations in
      * parallel. Usage: {@code -Dthread_pool_size=N} */
    public static int threadPoolSize () {
-        return Integer.getInteger("thread_pool_size", Runtime.getRuntime().availableProcessors()-1);
+        int defaultSize = Math.max(Runtime.getRuntime().availableProcessors()-1, 1);
+        return Integer.getInteger("thread_pool_size", defaultSize);
    }

    /** Parses a Java version system property using the supplied regular expression. The numbers