diff --git a/code/features-convert/data-extractors/java/nu/marginalia/extractor/TermFrequencyExporter.java b/code/features-convert/data-extractors/java/nu/marginalia/extractor/TermFrequencyExporter.java
index 18fb3261..3bcc9cf2 100644
--- a/code/features-convert/data-extractors/java/nu/marginalia/extractor/TermFrequencyExporter.java
+++ b/code/features-convert/data-extractors/java/nu/marginalia/extractor/TermFrequencyExporter.java
@@ -54,7 +54,7 @@ public class TermFrequencyExporter implements ExporterIf {
         TLongIntHashMap counts = new TLongIntHashMap(100_000_000, 0.7f, -1, -1);
         AtomicInteger docCount = new AtomicInteger();
 
-        SimpleBlockingThreadPool sjp = new SimpleBlockingThreadPool("exporter", Math.clamp(2, 16, Runtime.getRuntime().availableProcessors() / 2), 4);
+        SimpleBlockingThreadPool sjp = new SimpleBlockingThreadPool("exporter", Math.clamp(Runtime.getRuntime().availableProcessors() / 2, 2, 16), 4);
         Path crawlerLogFile = inputDir.resolve("crawler.log");
 
         for (var item : WorkLog.iterable(crawlerLogFile)) {
diff --git a/code/libraries/language-processing/java/nu/marginalia/language/sentence/SentenceExtractor.java b/code/libraries/language-processing/java/nu/marginalia/language/sentence/SentenceExtractor.java
index bb1e3771..8dd818a3 100644
--- a/code/libraries/language-processing/java/nu/marginalia/language/sentence/SentenceExtractor.java
+++ b/code/libraries/language-processing/java/nu/marginalia/language/sentence/SentenceExtractor.java
@@ -59,7 +59,7 @@ public class SentenceExtractor {
             logger.error("Could not initialize sentence detector", ex);
         }
 
-        synchronized (this) {
+        synchronized (SentenceExtractor.class) {
             if (ngramLexicon == null) {
                 ngramLexicon = new NgramLexicon(models);
             }