hbase-hbck2/src/main/java/org/apache/hbase/hbck1/HBaseFsck.java [1389:1400]:
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      for (Future<?> f : futures) {
        if (!exceptions.isEmpty()) {
          break;
        }
        try {
          f.get();
        } catch (ExecutionException e) {
          LOG.error("Unexpected exec exception!  Should've been caught already.  (Bug?)", e);
          // Shouldn't happen, we already logged/caught any exceptions in the Runnable
        }
      }
    } catch (IOException e) {
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hbase-hbck2/src/main/java/org/apache/hbase/hbck1/HBaseFsck.java [4796:4807]:
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        for (Future<?> f : futures) {
          if (!exceptions.isEmpty()) {
            break;
          }
          try {
            f.get();
          } catch (ExecutionException e) {
            LOG.error("Unexpected exec exception!  Should've been caught already.  (Bug?)", e);
            // Shouldn't happen, we already logged/caught any exceptions in the Runnable
          }
        }
      } catch (IOException e) {
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